Military abbreviations used in service files
The abbreviations appear in alphabetical order below.
Military abbreviations used in service files starting with #
- (A)
- Air
- 11thIFofC
- 11th Regiment (Irish Fusiliers of Canada)
- 15thALI
- 15th Regiment (Argyll Light Infantry)
- 21AG
- 21st Army Group
- 29thHLI
- 29th Regiment (Highland Light Infantry of Canada)
- 2ndCOR
- 2nd Battalion (Central Ontario Regiment)
- 60thVRC
- 60th Battalion (Victoria Rifles of Canada)
Military abbreviations used in service files starting with A
- A&Dbooks
- Admission & Discharge Books
- A&FF
- Acceptance & Ferry Flight (129-Trenton)
- A&Q
- Administrative Branches of the Staff
- A&Q
- Administrative Branches to the Staff
- A&SHigh
- Argyll & Sutherland Highlanders of Canada (Princess Louise's)
- A&T
- Administration and Training
- A&T Staff
- Administrative and Training Staff
- A/
- Assistant
- A/
- Acting (Rank) - higher rank held on a temporary basis - also known as a brevet rank for officers
- A/A
- Anti-aircraft
- A/A
- Army Act
- A/Bandsmn
- Assisting Bandsman
- A/Blkmth
- Acting Blacksmith
- A/C
- Aircraft
- A/C
- Air Commodore
- A/C
- Anti-Aircraft
- A/C
- Air Crew
- A/C/M
- Air Chief Marshall
- A/Capt
- Acting Captain
- A/CNAS(E)
- Assistant Chief of Naval Administration and Supply (Equipment)
- A/DMin
- Assistant Deputy Minister
- A/DNS
- Assistant Director of Naval Stores
- A/E
- Aeronautical Engineering in the Fleet Air Arm
- A/EA
- Acting Electrical Artificer
- A/ERA
- Acting Engine Room Artificer
- A/G
- Anti-Gas
- A/Joiner
- Acting Joiner
- A/M
- Air Marshall
- A/NCSO
- Acting Naval Control Service Officer
- A/OA
- Acting Ordnance Artificer
- A/p
- All Purpose
- A/Plbr
- Acting Plumber
- A/Pntr
- Acting Painter
- A/RA
- Acting Radio Artificer
- A/S
- Anti-Submarine
- A/SA
- Anti-Submarine Artificer
- A/SD
- Anti-Submarine Detector
- A/Sec
- Assistant Secretary
- A/Shpt
- Acting Shipwright
- A/SO(CO)
- Acting Staff Officer (Combined Operations)
- A/SSFO
- Anti-Submarine Ship Fitting Officer
- A/STTV
- Anti-Submarine Target Towing Vessels
- A/SYacht
- Anti-Submarine Yacht
- A/T
- Anti-Tank
- A/T
- Anti-Torpedo
- A/V/M
- Air Vice-Marshall
- AA
- Anti-Aircraft Rate
- AA
- Assistant Adjutant
- AA
- Active Army
- AA
- Anti-Aircraft
- AA
- Army Act
- AA&CD
- Anti-Aircraft Coast Defence
- AA&QMG
- Assistant Adjutant and Quartermaster-General
- AA(MG)BRCA
- Anti-Aircraft (Machine Gun) Battery, Royal Canadian Artillery
- AA(MG)BRCAST
- Anti-Aircraft (Machine Gun) Battery, Royal Canadian Artillery Searchlight Troop
- AA(MG)TRCA
- Anti-Aircraft (Machine Gun) Troop, Royal Canadian Artillery
- AA/SA
- Acting Anti-Submarine Artificer
- AAA
- Appointed Assistant Adjutant
- AAAFCRCA
- Anti-Aircraft Artillery Formation Camp, Royal Canadian Artillery
- AAARC
- Artillery Anti-Aircraft Reinforcement Camp
- AAB"Z"F
- Anti-Aircraft Battery "Z" Force (Iceland)
- AABS/LTRCA
- Anti-Aircraft Battery Searchlight Troop, Royal Canadian Artillery
- AABSRCCS
- Anti-Aircraft Brigade Signals, Royal Canadian Corps of Signals
- AABW/SRCOC
- Anti-Aircraft Brigade Workshop, Royal Canadian Ordnance Corps
- AAG
- Assistant Adjutant-General
- AAGORRCA
- Anti-Aircraft Gun Operations Room, Royal Canadian Artillery
- AAI
- Allied Armies in Italy
- AANS
- Army Auxiliary Nursing Service
- AARRCA
- Anti-Aircraft Regiment, Royal Canadian Artillery
- AAS
- Air Armament School
- AAS/LCoy
- Anti-Aircraft Searchlight Company
- AAUS&FWTC
- Anti-Aircraft Unit Staging & Fortress Weapon Training Camp
- AB
- Able Seaman
- ABCD
- Atomic, Biological, Chemical & Defensive Warfare Course
- ABOCRCOC
- Armoured Brigade Ordnance Company, Royal Canadian Ordnance Corps
- ABPO
- Army Base Post Office, Canadian Postal Corps
- ABPostal
- Able Seaman (Postal)
- ABranch
- Adjutant General's Branch
- Abs
- Absent, Absence
- ABW/SRCOC
- Advanced Base Workshop (Royal Canadian Ordnance Corps)
- AC
- Aircraft Controlman
- AC
- Armourer's Crew
- AC
- Armoured Car
- AC
- Ambulance Corps
- AC
- Army Corps
- AC
- Aircraft Carrier
- AC&R
- Appointments, Commissions and Rewards
- AC&WSqn
- Aircraft Control & Warning Squadron
- AC1
- Aircraftman 1st Class
- AC2
- Aircraftman 2nd Class
- ACBO
- Acting Bombardier
- ACC
- Anglican Church of Canada
- ACC(I)
- Atlantic Convoy Conference Minutes
- AccKd
- Accidentally Killed
- accn
- Accommodation
- ACCPT
- Acting Captain
- ACGS
- Assistant Chief of the General Staff
- ACHQ
- Air Command Headquarters
- ACHRCAMC
- Alton Convalescent Hospital, Royal Canadian Army Medical Corps
- ACHU
- Armoured Corps Holding Unit
- ACI
- Army Council Instruction
- ACIAF
- Appraisal Course Interim Army Force
- ACk
- Assistant Cook
- AckAck
- Anti-Aircraft
- AC-LT
- Acting Lieutenant
- ACMF
- Allied Central Mediterranean Force
- ACNI
- Assistant Commander of Naval Information
- ACNS
- Assistant Chief of the Naval Staff
- ACO
- Air Cadet Officer
- ACOp
- Aircraft Control Operator
- AC-OSAILS
- Army Co-operative Squad Air Intelligence Liaison Section
- ACO-WPA
- Area Commandant Order - Work Point Area
- ACPLofH
- Acting Corporal of Horse
- AC-QM
- Acting Quarter Master
- ACR
- Armoured Car Regiment
- ACR(RCD)
- Armoured Car Regiment, Royal Canadian Dragoons
- ACR(RCD)AP
- Armoured Car Regiment, Royal Canadian Dragoons Advanced Party
- ACS
- Air Cadet Squadron
- ACS
- Distinguishing Letters on Files of Joint Service Committee, Atlantic Coast
- ACS
- Atlantic Command Signals
- ACSAILSCASF
- Atlantic Command Squadron Army Intelligence Liaison Section, Canadian Active Service Force
- AC-SE
- Acting Sergeant
- ACSIC
- Atlantic Command Security Intelligence Section
- ACSILS
- Atlantic Command Squadron Intelligence Liaison Section
- ACSqn
- Army Co-operation Squadron (Royal Canadian Air Force)
- ACSU
- Acting Surgeon
- Act
- Acting (Rank)
- ACT
- Annual Camp Training
- ACU
- Aircrew Conditioning Units
- ACV
- Aircraft Carrier Vessels
- ACYCCorps
- Army Cyclist Corps
- AD
- Administration & Discipline (Director of Organization)
- AD
- Arvida Defences
- AD
- Air Radio Mechanic (Air Radar)
- AD&M
- Advanced Driving and Maintenance
- AD&MS
- Advanced Driving and Maintenance School
- AD&MTCRCAR
- Advanced Driving and Maintenance Training Centre, Royal Canadian Artillery Reinforcements
- AD(Svy)
- Assistant Director of Surveys
- ADAG
- Assistant Deputy Adjutant-General
- ADB(RdeC)CICEC
- Airfield Defence Battalion (Regiment de Chateauguay) Canadian Infantry Corps, East Coast
- ADC
- Aide-de-Camp
- ADC
- Aerodrome Defence Company
- ADCP(N)
- Assistant Director Civilian Personnel (Navy)
- ADDS
- Assistant Director of Dental Services
- ADED
- Assistant Director of Engineer Development
- ADES
- Assistant Director of Educational Services
- ADES
- Assistant Director of Engineer Services
- ADHOC(G)
- Ad Hoc Greek Battalion
- ADIO
- Assistant Director of Internment Operations
- Adj
- Adjutant - administrative assistant to a commanding officer
- Adjt
- Adjutant - administrative assistant to a commanding officer
- Adm
- Administration
- Adm
- Admitted - soldiers entering hospital for medical treatment
- ADM
- Assistant Deputy Minister
- ADM(N)
- Assistant Deputy Minister (Naval)
- AdmClk
- Administrative Clerk
- Adm'd
- Admitted
- ADMGO
- Assistant Deputy Master General of Ordnance
- Admin
- Administration
- ADMN
- Assistant Deputy Minister (Naval)
- ADMS
- Assistant Director of Medical Services
- ADNO
- Assistant Director Naval Ordnance
- ADNP
- Assistant Director of Naval Personnel
- ADOS
- Assistant Director of Ordnance Services
- ADP
- Aerodrome Defence Platoon
- ADQMG
- Assistant Deputy Quartermaster General
- ADQMG(AE)
- Assistant Deputy Quartermaster General (Army Equipment)
- ADRCAPC
- Aldershot Detachments, Royal Canadian Army Pay Corps
- ADRCASC
- Area Detachment, Royal Canadian Army Service Corps
- ADS
- Advanced Dressing Station
- ADS
- Army Dressing Station
- ADSRCS
- Armoured Divisional Signals, Royal Canadian Corps of Signals
- ADTC(CAD)RCASC
- Armoured Division Troops Company (Canadian Armoured Division), Royal Canadian Army Service Corps
- ADTCSRCASC
- (Armoured) Division Troop Carrying Section, Royal Canadian Army Service Corps
- ADTD
- Assistant Director Technical Division
- ADTech
- Air Defence Technician
- ADUC
- Advanced Driving Universal Carriers
- Adv
- Advance(d)
- ADVS
- Assistant Director of Veterinary Services
- Advtrg
- Advanced Training
- ADW/SPACRCASC
- Advanced Detachment Workshop Pl Art Company, Royal Canadian Army Service Corps
- AE
- Algerine Escorts
- AEC
- Army Enlistment Centre
- AED
- Ammunition Empties Detachment
- AEF
- Allied Expeditionary Force
- AEF
- American Expeditionary Force
- AEinC
- Assistant Engineer in Chief (Naval)
- AEM
- Air Engine Mechanic
- AERE
- Aerospace Engineer
- AETech
- Aero Engine Technician
- AF
- Air Fitter
- AF
- Active Force
- AFBRCCS
- Army Field Brigade, Royal Canadian Corps of Signals
- AFC
- Armed Forces Council
- AFC
- Air Force Cross
- AFHQ
- Allied Forces Headquarters
- AFHQ
- Air Force Headquarters
- AFM
- Air Frame Mechanic
- AFM
- Air Force Medal
- AFO
- Admiralty Fleet Orders
- AFPac
- Allied Forces Pacific
- AFRS
- Armed Forces Radio Service
- AFRS
- Army Field Regiment Signal
- AFRSRCASC
- Army Field Regiment Section, Royal Canadian Army Service Corps
- AFS
- Advanced Flying School
- AFSC
- Armed Forces Staff College
- AFSCRCASC
- Armed Forces Sleeper Company, Royal Canadian Army Service Corps
- AFSS
- Army Field Security Section
- AFTech
- Airframe Technician
- AFU
- Air Fighting Unit
- AFU
- Advance Flying Unit
- AFV
- Armoured Fighting Vehicle
- AFVW/SSRCOC
- Armoured Fighting Vehicle Workshop Section, Royal Canadian Ordnance Corps
- AFW/SRCOC
- Army Field Workshop, Royal Canadian Ordnance Corps
- AG
- Adjutant General
- AG
- Air Gunner
- AG1,2or3
- Adjutant General Staff Officer 1, 2 or 3
- AGB
- Adjutant General's Base
- AGCB
- Awarded Good Conduct Badge
- AGGTS
- Air Gunners Ground Training School
- AGHU
- "A" Group Holding Unit
- AGRA
- Army Group Royal Artillery
- AGRCA
- Army Group Royal Canadian Artillery
- AGRCAS
- Army Group Royal Canadian Artillery Signals
- AGRE
- Army Group, Royal Engineers
- AGRU
- "A" Group Reinforcement Unit
- AGTS
- Aircrew Graduate Training Schools
- AGYMST
- Army Gymnastic Staff
- AH
- Aircraft Handler
- AH
- Admiralty Fleet Order
- AHC
- Army Hospital Corps
- AHQ
- Army Headquarters
- AHQCAPO
- Area Headquarters Canadian Army Post Office
- AHU
- Artillery Holding Unit
- AHU
- Administrative and Holding Unit(s)
- AI
- Assistant Instructor
- AI
- Acting Interpreter
- AIB
- "A" Infantry Battalion
- AICVGofC
- Angler Internment Camp Veterans Guard of Canada
- AID
- Aeronautical Inspection District
- AIEMSupt
- Aircraft Instrument and Electrical Maintenance Superintendent
- AIF
- Australian Imperial Force
- AIG
- Address Indicating Group
- AILS(A)D
- Army Intelligence Liaison Section (Armoured) Division
- AILSection
- Army Intelligence Liaison Section
- AILSection
- Air Intelligence Liaison Section
- AIR
- Assistant Instructor's Regiment
- AirB
- Air Bomber
- AirBosn
- Air Boatswain
- AirlineCoy
- Airline Company, Royal Engineers
- AirTCon
- Air Traffic Controller
- AIS
- Aeronautical Inspectors School
- AITC(R)
- Advanced Infantry Training Centre (Reserve)
- AKA
- Also Known As
- AL
- Air Mechanic (Electrics)
- AL/CPL
- Acting Lance Corporal
- ALC
- Assault Landing Craft
- Alg
- Algerine Escorts
- AlgR
- Algonquin Regiment
- ALI
- (15th Regiment) Argyll Light Infantry
- Allce
- Allowance
- ALO
- Australian Liaison Officer (Air)
- ALOC
- Advanced Logistics Officers Course
- ALQR
- Algonquin Regiment
- Alta
- Alberta
- AM
- Air Mechanic (1st, 2nd or 3rd Class)
- AM
- Albert Medal
- AM
- Naval Airman
- AM(No)
- Admiralty Publication
- AMAE
- Air Member for Aeronautical Engineering
- AMAP
- Air Member Air Plan
- AMAS
- Air Member for Air Staff
- Amb
- Ambulance
- AMB
- Armoured Motor Battery
- AMC
- Armed Merchant Cruiser
- AMC
- Alberni Military Camp
- AMC
- Arnprior Military Camp
- AMC
- Army Medical Centre
- AMC
- Australian Medical Corps
- AMC
- Armed Merchant Cruiser
- AMCU
- Anti-Malarial Control Unit
- Am'd
- Amended
- AMD
- Auxiliary Manning Depot
- AME
- Armament Maintenance Establishment
- AMERCA
- Armament Maintenance Establishment, Royal Canadian Artillery
- AMHRCAMC
- Alberni Military Hospital, Royal Canadian Army Medical Corps
- AMHRCAMC
- Aldershot Military Hospital, Royal Canadian Army Medical Corps
- AMHRCAMC
- Angler Military Hospital, Royal Canadian Army Medical Corps
- AMHRCAMC
- Arvida Military Hospital, Royal Canadian Army Medical Corps
- AmmnCol
- Ammunition Column
- Amn
- Ammunition
- AmoTech
- Ammunition Technician
- AMP
- Air Member for Personnel
- AMPTE
- Ambulance Private
- AMS
- Army Medical Staff
- AMS
- Air Member for Supply
- AMS
- Assistant Military Secretary
- AMSC
- Advanced Military Studies course
- AMSupt
- Aircraft Maintenance Superintendent
- AMT
- Air Member for Training
- AMTRS
- Area Mechanical Transport Repair Shops
- AMU
- Air Movements Unit
- AN
- Air Mechanic (Engines)
- ANAV
- Air Navigator
- AND
- Admiralty Net Defence
- ANS
- Air Navigation School
- ANSec
- Assistant Naval Secretary
- Anti-tk
- Anti-tank
- ANZAC
- Australia and New Zealand Army Corps
- AO
- After Order
- AO
- Air Mechanic (Ordnance)
- AO
- Accountant Officer
- AO
- Army Order
- AOC
- Air Officer Commanding
- AOC
- Army Ordnance Corps
- AOC-in-C
- Air Officer Commanding in Chief
- AODRCOC
- Advanced Ordnance Depot, Royal Canadian Ordnance Corps
- AOP
- Air Observation Post
- AOPSRCA
- Air Observation Post Squadron, Royal Canadian Artillery
- AOPSRCAF
- Air Observation Post Squadron, Royal Canadian Air Force
- AOS
- Air Observer School
- AOW/SRCOC
- Army Ordnance Workshop, Royal Canadian Ordnance Corps
- AP
- Administration & Personnel Section (Organization)
- AP
- Apothecary
- AP
- Air Police
- AP
- Aid Post
- AP&Rs
- Appointments, Promotions and Retirement List
- APA-TR
- (Advanced Party) Anti-Tank Regiment
- APC
- Army Pay Corps
- APCAS
- Administration Personnel Canadian Army Shows
- APCASEU(AS)
- Administration Personnel Canadian Auxiliary Services Entertainment Unit (Army Shows)
- APCBOW/SRCOC
- Advanced Party Canadian Base Ordnance Workshop, Royal Canadian Ordnance Corps
- APCFC
- Advance Party Canadian Forestry Corps
- APCHRCAMC
- Alderbrooke Park Convalescent Hospital, Royal Canadian Army Medical Corps
- APCinC
- Air Officer Commanding-in-Chief
- APD
- Army Provost Depot
- APD
- Army Pay Department
- APDOFPRCOC
- Advance Party Divisional Ordnance Field Park, Royal Canadian Ordnance Corps
- APE
- Address Prior to Enlistment
- APFARCAMC
- Advance Party Field Ambulance, Royal Canadian Army Medical Corps
- APHQADADHQ
- Advanced Party Headquarters Armoured Division Advance Divisional Headquarters
- APIS
- Air Photo Interpretation Section
- APIS
- Army Photographic Interpretation Section
- APISCintC
- Army Photographic Interpretation Section, Canadian Intelligence Corps
- APLU
- Army Pay Ledger Unit
- APM
- Assistant Provost Marshal
- APOC
- Army Post Office Corps
- Appces
- Appendices
- Apptmts
- Appointments
- APPU
- (Canadian) Army Photo Processing Unit, Canadian Intelligence Corps
- APPUCPC
- Advance Party Postal Unit Canadian Postal Corps
- Appx
- Appendix
- APS
- Army Postal Service
- APS(N)
- Assistant Private Secretary To the Minister (Navy)
- APTo"Z" F
- Attached Personnel to "Z" Force (Iceland)
- AQMG
- Assistant Quartermaster-General
- AR
- Algonquin Regiment
- AR
- Air Radio
- AR
- Air Rigger
- AR(1H)CACAP
- Armoured Regiment, (1st Hussars) Canadian Armoured Corps Advance Party
- AR(BCD)
- Armoured Regiment, British Columbia Dragoons
- AR(FGH)
- Armoured Regiment, (Fort Garry Horse)
- AR(GGFG)AD
- Armoured Regiment, (Governor General's Horse Guards) Armoured Division
- AR(GGHG)CA
- Armoured Regiment, (Governor General's Horse Guards) Canadian Army
- AR(H)
- Armoured Regiment, (Hussars)
- AR(LSH)(RC)AF
- Armoured Regiment, (Lord Strathcona's Horse) (Royal Canadians) Active Force
- AR(LSH)AP
- Armoured Regiment, (Lord Strathcona's Horse) Advance Party
- ARC
- Army Reception Centre
- ARC
- Appraisal and Refresher Course
- ARCM
- Associate, Royal College of Music
- ARCR
- Armourer's Crew
- ARD
- Alberta Regimental Depot - facility in England used to assemble men and to store and administer equipment and materials
- AreaEngr
- Area Engineer
- ARH
- Army Rail Head
- ARITCIC
- Army Refugee Interrogation Team, Canadian Intelligence Corps
- ARL
- Admiralty Research Laboratory
- Arm(BorG)
- Armourer (Bombs or Guns)
- Armd
- Armoured
- Armr
- Armourer
- ARmtSPC
- Armament Systems Performance Checker
- ARO
- Admiralty Record Office
- ARO
- Administrative Routine Orders
- ARP
- Air Raid Precautions
- ARRC
- Associate of the Royal Red Cross
- Art
- Article
- Art
- Artillery
- ARTech
- Aircraft Refinishing Technician
- ArtEngr
- Artificer Engineer
- Arty
- Artillery
- Arty Svy
- Artillery Surveyor
- Arty Tech
- Artillery Technician
- ArtyLoc
- Artillery Locator
- Artymn
- Artilleryman
- ARU
- Artillery Reinforcement Unit
- AS
- Air Radio Mechanic (Air Wireless)
- AS
- Air Secretary
- AS and ACSU
- Assistant and Acting Surgeon
- AS&DB
- Army Salvage & Disposal Board
- ASADJand2L
- Assistant Adjutant and Second Lieutenant
- ASC
- Advanced Surgical Centre
- ASC
- Army Service Corps
- ASC
- Aerospace System Engineering Projects Officer
- ASCA
- Auxiliary Services Canadian Army
- ASCL
- Assistant Clerk
- ASCO
- Assistant Commodore
- ASCRCE
- Area Signal Company, Royal Canadian Engineers
- ASD
- Army Schools Department
- ASE
- Army Survey Establishment
- ASF
- Active Service Force
- ASGT
- Acting Sergeant
- ASIN
- Assistant Engineer
- ASJT
- Acting Sergeant
- ASL
- Admiral Superintendent, Alexandria
- ASLAD
- Army Signals Light Aid Detachment
- ASNU
- Assistant Nurse
- ASO
- Assistant Supply Officer
- ASO
- Armament Supply Officer
- ASO
- Area Security Officer
- ASO(I)
- Assistant Staff Officer (Intelligence)
- ASP
- Air Stores Park (406) (Royal Canadian Air Force)
- ASP
- Admiralty Salvage Pontoon
- ASPU
- Assistant Purveyor
- ASR
- Submarine Rescue Vessel, Auxiliary (US)
- ASS
- Army Staff Section
- ASSAMVLH
- Assam Valley Light Horse
- Ass't
- Assistant
- AsstNSec
- Assistant Naval Secretary
- AsstPayr
- Assistant Paymaster
- ASSU
- Assistant Superintendent
- ASSU
- Air Support Signal Unit
- ASTO
- Assistant Transport Officer
- ASU
- Air Supply Unit
- ASU
- Assistant Surgeon
- ASU
- Aircraft Storage Units
- ASV
- Anti-Surface Vessel
- ASvyCoy
- Air Survey Company
- ASW
- Anti-Submarine Warfare
- AT
- Air Artificer (Airframes and Engines)
- AT
- Auxiliary Tanker
- AT
- Ocean-going Tug, Auxiliary (US)
- AT
- Aviation Technician
- AT
- Armoured Train
- ATA
- Air Transport Auxiliary (British)
- ATB
- Allied Torpedo Boats
- ATB(OR)
- Army Tank Battalion (Ontario Regiment)
- ATBHSSRCOC
- Army Tank Brigade, Heavy Support Squadron, Royal Canadian Ordnance Corps
- ATBOFPRCOC
- Army Tank Brigade, Ordnance Field Park, Royal Canadian Ordnance Corps
- ATC
- Advance Training Centre
- ATC
- Airport Traffic Control (US)
- ATC
- Air Traffic Control
- ATCDE
- Awarded the Canadian Efficiency Decoration
- ATCoy
- Army Troops Company
- ATCR
- Advanced Training Centre Reserve
- ATCRCE
- Army Troops Company, Royal Canadian Engineers
- ATI
- Access to Information Act
- Atk
- Anti-Tank
- A-tk
- Anti-tank
- Atl
- Atlantic
- AtmstSTech
- Armament Systems Technician
- ATO
- Air Treasury Office
- ATO
- Aircraft Torpedo Office
- ATO
- Ammunition Technical Officer
- ATP
- Annual Training Pay
- ATps
- Army Troops Company
- ATps
- Army Troops
- ATps
- Army Troops
- ATR
- Rescue Tug, Auxiliary (US)
- ATR(1H)
- Army Tank Regiment (1st Hussars)
- ATRRCACASF
- Anti-Tank Regiment, Royal Canadian Artillery, Canadian Active Service Force
- ATS
- Army Trades School
- Att
- Attached - to be made part of a specific unit on a temporary basis
- ATTA
- Full duties and return for treatment
- Attach
- Attached - to be made part of a specific unit on a temporary basis
- Attachd
- Attached - to be made part of a specific unit on a temporary basis
- ATTB
- Advance Tactical Training Base
- ATTB
- Light Duties - Excused Physical Training Drill and Commanding Officer's Parades
- ATTC
- Excused all duties - Confined to barracks or home
- ATTC-48
- Excused all duties for 48 hours
- Att'd
- Attached - to be made part of a specific unit on a temporary basis
- AttP
- Attached Personnel
- ATTU
- Air Target Towing Unit
- ATX
- Admiralty Trunk Exchange
- AU
- Amplifier Unit
- AUCWAC
- Administrative Unit Canadian Women's Army Corps
- AudGeneral
- Auditor General (National Defence Staff)
- AUS
- Army of the United States
- Auth
- Authorized - designation of the individual or organization permitting the action noted
- Auth
- Authority - designation of the individual or organization permitting the action noted
- Auto
- Automobile
- Aux
- Auxiliary
- Aux
- Division of Auxiliary Services
- Aux Serv
- Canadian Auxiliary Services
- Aux(A)
- Senior Auxiliary Services Officer (Air)
- Aux(N)
- Senior Auxiliary Services Officer (Naval)
- AuxA/AS
- Auxiliary Anti-Aircraft Ships
- AuxMS
- Auxiliary Minesweepers
- AuxServ
- Canadian Auxiliary Services
- AVC
- Army Veterinary Corps
- AVD
- Seaplane Tender, Destroyer, Auxiliary (US)
- AVGO
- Auxiliary Vessels Gunnery Officer
- AVGP
- Armoured Vehicle General Purpose (Grizzly, Cougar and Bison)
- AVM
- Air Vice-Marshal
- AvnTech
- Aviation Technician
- AVP
- Seaplane Tender (small) Auxiliary (US)
- AVR
- Aircraft Rescue Vessel (US)
- AVRE
- Armoured Vehicle, Royal Engineers
- AVS
- Army Veterinary Service
- AvsTech
- Avionics Technician
- AW
- Administrative Writer
- AW1
- Aircraftwoman 1st Class
- AW2
- Aircraftwoman 2nd Class
- AWC
- Air War College
- AWC
- Air Weapons Control
- AWCoy
- Artizan Works Company
- Awd'd
- Awarded
- AWF
- Army War College Fellowship (U.S.)
- AWL
- Absent With Leave
- AWOL
- Absent Without Leave - away from a unit without permission; an offence under military law
- AWS
- Army War College Fellowship (U.S.)
- AWSqn
- All-weather Squadron
- AyrYeo
- Ayrshire Yeomanry
Military abbreviations used in service files starting with B
- B & GFU
- Bombing and Gunnery Flying Unit
- B & GS
- Bombing and Gunnery School
- B of the MG of the ONDHQ
- Branch of the Master General of the Ordnance, National Defence Headquarters
- B Report
- Burial Report
- BA
- Bandsman
- BA
- Bermuda Area
- BAC
- British Air Commission
- BAC
- Brigade Ammunition Column
- BAD
- British Admiralty Delegation
- BADR(PC)
- British Admiralty Delegation Representative, Pacific Coast
- BAFO
- British Air Force Overseas
- BAKS
- Barracks (US)
- BAM
- Large Minesweeper
- BAMR
- British Admiralty Maintenance Representative
- BAMS
- Broadcasts to Allied Merchant Ships
- Bandsmn
- Bandsman
- Bandsmn(Prob)
- Bandsman (Probationer)
- BAO
- Base Accounting Officer
- BARM
- British Advisory Repair Mission
- BARS
- Salvage Vessel
- BarTdr
- Bar Tender
- BAS(O)
- British Army Staff (Officers)
- BAS(OR)
- British Army Staff (Other Ranks)
- BASM
- Battalion Sergeant Major
- BASR
- British Admiralty Supply and Repairs
- BASR
- British Admiralty Supply Representative
- BAT
- Beam Approach Training
- BATM
- British Admiralty Technical Mission
- Batt
- Battalion - unit of approximately 1,000 men commanded by a lieutenant-colonel
- Batt
- Battery
- Batt'n
- Battalion - unit of approximately 1,000 men commanded by a lieutenant-colonel
- BATUS
- British Army Training Unit, Suffield
- BAV
- Boom Attendant Vessels
- BB
- Battleship (US)
- BB
- Bugle Band
- BB
- Bailey Bridge
- BBC
- British Broadcasting Corporation (U.K.)
- BC
- British Columbia
- BC
- Battery Commander
- BCA
- Battery Commander Assistant
- BCA
- Biscay and Channel Area
- BCD
- British Columbia Dragoons
- BCH
- Barriefield Camp Hospital
- Bcook
- Boy Cook
- BCPO
- Base Civilian Personnel Officer
- BCQ
- Base Commander, Queensborough
- BCR
- British Columbia Regiment
- BCRCASC
- Bridge Company, Royal Canadian Army Service Corps
- BCRD
- British Columbia Regimental Depot - facility in England used to assemble men and to store and administer equipment and materials
- BCRM
- British-Canadian Recruiting Mission
- BCSO
- British Central Scientific Office
- BD
- Base Depot
- BD
- Blood Donor
- BD
- Bandsman
- BDB
- Branch Detention Barracks
- BDC
- Battle Drill Course
- BDCASS
- "Bandoliers" Detachment - Canadian Auxiliary Services Section
- BDCRE
- Bomb Disposal Company Royal Engineers
- BDD
- Boom Defence Depot
- Bde
- Bombardier
- Bde
- Brigade - unit of approximately 4,000 men commanded by a brigadier-general
- BDE
- Balloon Development Establishment
- BDE
- Convoy Escort Vessel
- BdeGp
- Brigade Group
- Bdm
- Bandsman
- BDO
- Boom Defence Officer
- BDofMS
- Base Depot of Medical Stores
- Bdr
- Bombardier (Cpl in the Artillery)
- BDS
- Bomb Disposal School
- BDS
- Battle Drill School
- BD-SE
- Band Sergeant
- Bdsm
- Bandsman
- BDTC
- Battle Drill Training Centre
- BDV
- Boom Defence Vessel
- BDZ
- Commander in Chief Netherlands Navy, London
- BEC
- Basic Electronics Course
- BEC
- British Escort Craft
- BedfR
- Bedfordshire Regiment
- BedfYeo
- Bedfordshire Yeomanry
- BEF
- British Expeditionary Force - army of more than 3,000,000 men established by the Government of Britain for service overseas
- BEM
- Basic Electronics Mechanic
- BEM
- British Empire Medal
- BerksR
- Berkshire Regiment
- BerksYeo
- Berkshire Yeomanry
- BET
- Basic Educational Test
- BF
- Bring Forward
- BFA
- Blank Firing Attachment
- BFA
- Battle First Aid
- BFPO
- British Forces Post Overseas
- BFTS
- British Flying Training Schools
- BG
- Base Gagetown (Theatres of Service)
- BG
- Brigadier-General
- BG
- Brigade Group
- BG
- Battle Group
- BGC(C)RCASC
- Brigade Group Company (Company) Royal Canadian Army Service Corps
- BGGS
- Brigadier General of General Staff
- BGH
- British General Hospital
- Bglr
- Bugler
- BGRAM
- Basegram
- BGS
- Brigadier, General Staff
- BGS
- Bombing and Gunnery Schools
- BH&MDATKRRCA
- Beachy Head & Michel Dean Anti-Tank Ranges Royal Canadian Artillery
- bhp
- Brake Horse Power
- BHQ
- Brigade Headquarters
- BHQS
- Barriefield Headquarters Staff
- BHRRCA
- Beachy Head Ranges, Royal Canadian Artillery
- BHX
- Bermuda Portion of Halifax (New York) to United Kingdom Convoy
- BI
- Bandsman Instrumentalist
- BIB
- "B" Infantry Battalion
- BIC
- Bowmanville Interment Camp
- BioTech
- Biosciences Technician
- BItoCSGHQEAGP
- (Brussels) Increment to Canadian Section General Headquarters Echelon Army Group
- BJCB
- British Joint Communications Board
- BK
- Battery Captain
- BK
- Blacksmith
- BKR
- Baker
- Bks
- Barracks
- BL
- Breech Loading
- bldg(s)
- Building(s)
- Bldmth
- Blacksmith
- BLK
- Blacksmith
- BLOC
- Basic Logistics Officers Course
- BLP
- Bombing Landplane (US)
- BM
- Band Master
- BM
- Brevet Major
- BM
- Brigade Major
- BMA
- Band Master
- BMCA
- British Maintenance Commander, Argentina
- BMD
- Bengal Medical Department
- BMET
- Bio-Medical Engineering Technician
- BMH
- Brandon Military Hospital
- BMH
- Brantford Military Hospital
- BMH(PHI)
- Brockville Military Hospital (PHI)
- BMHRCAMC
- Botwood Military Hospital, Royal Canadian Army Medical Corps
- BMHRCAMC
- Bowmanville Military Hospital, Royal Canadian Army Medical Corps
- BMHRCAMC
- Brampton Military Hospital, Royal Canadian Army Medical Corps
- Bmn
- Bandsman
- BMQ
- Basic Military Qualification
- Bmr
- Bandmaster
- BMS
- Brigade Medical Station
- BMSM
- British Merchant Shipping Mission
- BMV
- Boom Maintenance Vessels
- BMWT
- British Ministry of War Transport
- BMWTR
- British Ministry of War Transport Representative
- Bn
- Battalion
- BN
- Boatswain
- BN & PSH RCAMC
- Basingstoke Neurological & Plastic Surgery Hospital, Royal Canadian Army Medical Corps
- BNA
- British Naval Attache
- Bndsmn
- Bandsman
- BNH
- Basingstoke Neurological Hospital
- BNLO
- British Naval Liaison Officer
- BNLO
- British Naval Liaison Officer to French Naval Headquarters, London
- BNLO(RHN)
- British Naval Liaison Officer (Royal Hellenic Navy)
- BO
- Bombardier
- BOC
- Base Officer, Chasseurs
- BOD
- Base Ordnance Depot
- BOH
- British Official History
- BOI
- Boiler (US)
- Bomb
- Bombardier
- BOR
- Battalion Orderly Room
- BordR
- Border Regiment
- BOS
- Battalion Orderly Sergeant
- Bosn
- Boatswain
- BOTC
- Basic Officers Training Course
- BOW
- Base Ordnance Workshop
- Boy1
- Boy 1st Class
- BoySig
- Boy Signaller
- BPA
- Bureau of Pensions Advocates
- BPC
- Beach Protection Craft
- BPC
- Base Planning Committee
- BPET
- Battle Physical Efficiency Test
- BPO
- Base Post Office
- BPOCPC
- Base Post Office Canadian Postal Corps
- BPSO
- Base Personnel Selection Office
- BPT
- Battle Practice Target
- BPT
- Vosper Motor Torpedo Boat
- BPV
- Beach Protection Vessel
- BQMS
- Battery Quartermaster-Sergeant
- Br
- Bomber
- BR
- Brockville Rifles
- BR
- Bombing and Reconnaissance Squadron
- BR
- Book of Reference
- br(s)
- Bridge(s) or bridging
- BRCA
- Battery Royal Canadian Artillery
- BRCE
- Battalion Royal Canadian Artillery
- BRCHA
- Battery Royal Canadian Horse Artillery
- BrColRgt
- British Columbia Regiment
- BRCS
- British Red Cross Society
- BRCS & OStJJ
- British Red Cross Society and Order of St. John of Jerusalem
- BRG
- Bearing (US)
- Brig
- Brigadier
- Brig-Gen
- Brigadier-General
- Brit
- British
- BRLO
- British Routing Liaison Officer
- BRO
- British Routing Officer
- Brock R
- Brockville Rifles
- BRP RCOC
- Boot Rebuilding Plant, Royal Canadian Ordnance Corps
- BRSqn
- Bomber Reconnaissance Squadron, Royal Canadian Air Force
- BS
- Brigade School
- BS
- Battle Squadron
- BS(M)RCASC
- Bakery Section (Mechanical), Royal Canadian Army Service Corps
- BSA
- Barents Sea Area
- BSASSRCS
- Base Sub Area Signal Section, Royal Canadian Signals
- BSC
- Base Staging Camp
- BSD
- Base Supply Depot
- BSD
- Brandon Supply Depot
- BSM
- Battery Sergeant-Major
- BSMA
- Brigade Sergeant Major
- BSO
- (Commander in Chief) Netherlands Forces in the East
- BSO
- British Staff Officer
- BSRCE
- Boring Section, Royal Canadian Engineers
- BSS
- Base Supply Ship
- BTC
- Basic Training Centre
- BTC(A)
- Basic Training Centre (Active)
- BTC(R)
- Basic Training Centre (Reserve)
- Btln
- Battalion
- Btswn
- Boatswain
- Btty
- Battery - artillery unit commanded by a major and composed of four or six guns or mortars
- Bty
- Battery - artillery unit commanded by a major and composed of four or six guns or mortars
- BU
- Bugler
- BUACPATSO
- British Units Affecting Canadian Personnel Army Trades School Officers
- BucksYeo
- Buckinghamshire Yeomanry
- BUDOCKS
- Bureau of Yards and Docks (US)
- BUMA
- Bugle Major
- BUMED
- Bureau of Medicine and Surgery (US)
- BUPERS
- Bureau of Naval Personnel (US)
- BUPTE
- Bugler Private
- BUSANDA
- Bureau of Supplies and Accounts (US)
- BUSE
- Bugle Sergeant
- BUSHIPS
- Bureau of Ships (US)
- BUSRA
- British US Routing Agreement
- BUSRS
- British-United States Routing Agreement
- BUSUP
- Bureau of Supplies and Accounts (US)
- Butcher
- Butcher
- BW
- Black Watch
- BW(RHC)
- Black Watch (Royal Highlanders of Canada)
- BWI
- British West Indies
- BWRCEME
- Base Workshop Royal Canadian Electrical and Mechanical Engineers
- BX
- Boston-Halifax Convoy
- BYHC
- Buckinghamshire Cavalry Hussars
- BYMS
- British "Y" Class Minesweeper
- BZ
- Bristol Division, Royal Naval Volunteer Reserve
- BZA
- Brazilian Area
Military abbreviations used in service files starting with C
- C
- Canadian
- C
- Censor
- C
- Commissioned
- C
- Company
- C
- Cook
- C&A
- Corrections & Amendments
- C&AAA
- Coast & Anti-Aircraft Artillery
- C&AAATC
- Coast & Anti-Aircraft Artillery Training Centre
- C&P
- Counselling and Probation
- C&TC
- Commissariat and Transport Corps
- C&YR
- Carleton & York Regiment
- C(A)D(I)HU
- Canadian (Armoured) Division (Infantry) Holding Unit
- C(A)TBOW/SRCOC
- Canadian (Army) Tank Brigade Ordnance Workshop, Royal Canadian Ordnance Corps
- C(O)on"Q"L
- Canadian (Officers) on "Q" List
- C(W/T)V
- Calibration (Wireless Telegraphy) Vessel
- C/Blkmth
- Chief Blacksmith
- C/BTC
- Canadian Base Training Centre
- C/EA
- Chief Electrical Artificer
- C/ERA
- Chief Engine Room Artificer
- C/ERA(M)
- Chief Engine Room Artificer (Mechanic)
- C/Joiner
- Chief Joiner
- C/Mech
- Chief Mechanic
- C/MM
- Chief Motor Mechanic
- C/O
- Commanding Officer
- C/Plbr
- Chief Plumber
- C/Pntr
- Chief Painter
- C/PO(Postal)
- Chief Petty Officer (Postal)
- C/POCdr
- Chief Petty Officer Coder
- C/POCk
- Chief Petty Officer Cook
- C/POPhoto
- Chief Petty Officer Photographer
- C/POPtlmn
- Chief Petty Officer Patrolman
- C/POStwd
- Chief Petty Officer Steward
- C/POTel
- Chief Petty Officer Telegraphist
- C/POWtr
- Chief Petty Officer Writer
- C/RA
- Chief Radio Artificer
- C/Shpt
- Chief Shipwright
- C/SPO
- Chief Stoker Petty Officer
- C/Sto
- Chief Stoker
- C/Sto(FF)
- Chief Stoker (Fire Fighter)
- C1
- Chief Petty Officer 1st Class
- C1Div
- Clearance Diver
- C2
- Chief Petty Officer 2nd Class
- CA
- Canadian Army
- CA
- Control Armourer
- CA
- Heavy Cruiser (U.S.)
- CA"Y"F
- Canadian Army British West Indies Force
- CA&AA
- Coastal Artillery and Anti-Aircraft
- CA(A)
- Canadian Army (Active)
- CA(A)TC
- Canadian Army (Advanced) Training Centre
- CA(AF)
- Canadian Army (Active Force)
- CA(B)TC
- Canadian Army (Basic) Training Centre
- CA(M)
- Canadian Army (Militia)
- CA(NRMA)
- Canadian Army (National Resources Mobilization Act of 1940)
- CA(PF)
- Canadian Army (Permanent Force)
- CA(R)
- Canadian Army (Regular)
- CA(Res)or(R)
- Canadian Army (Reserve)
- CA(RF)
- Canadian Army (Reserve Force)
- CA(RR)
- Canadian Army (Regular Reserve)
- CA(SF)
- Canadian Army (Special Force)
- CA/SA
- Chief Anti-Submarine Artificer
- CA/SEE
- Captain, Anti-Submarine Experimental Establishment
- CA/TKRPRCASC
- Canadian Anti-Tank Regiment Platoon, Royal Canadian Army Service Corps
- CA2PS
- Canadian Army 2 Pounder School
- CAAC
- Crown Assets Allocation Committee
- CAAF
- Canadian Army Active Force
- CAAORRCA
- Canadian Anti-Aircraft Operations Room, Royal Canadian Artillery
- CAAS
- Canadian Army Administration School
- CAB
- Canadian Armoured Brigade
- CAB
- Canadian Army Band
- CABC
- Canadian Armoured Corps Band
- CABCRCASC
- Canadian Armoured Brigade Company, Royal Canadian Army Service Corps
- CABOC
- Canadian Armoured Brigade Ordnance Company
- CABRR
- Canadian Artillery Base Reinforcement Regiment
- CABS
- Canadian Armoured Brigade Signals
- CABTCA&TS
- Canadian Army Basic Training Centre Administrative and Training Staff
- CABW/SRCEME
- Canadian Advance Base Workshop, Royal Canadian Electrical and Mechanical Engineers
- CABW/SRCEME
- Canadian Armoured Brigade Workshop, Royal Canadian Electrical and Mechanical Engineers
- CAC
- Canadian Armoured Corps
- CAC(A)TC(CA)
- Canadian Armoured Corps (Advanced) Training Centre (Canadian Army)
- CACBTC
- Canadian Armoured Corps Basic Training Centre
- CACCRCASC
- Canadian Army Car Company, Royal Canadian Army Service Corps
- CACF
- Commander Captain-in-Command, Araken Coastal Forcer
- CACHU
- Canadian Armoured Corps Holding Unit
- CACOFP
- Canadian Armoured Corps Ordnance Field Park
- CACPRCASC
- Canadian Army Catering Pool, Royal Canadian Army Service Corps
- CACRU
- Canadian Armoured Corps Reinforcement Unit
- CACSCAC
- Canadian Air Control Section, Canadian Armoured Corps
- CACSqn
- Coast Artillery Co-operation Squadron, (Royal Canadian Air Force)
- CACTC
- Canadian Armoured Corps Training Centre
- CACTC(A)
- Canadian Armoured Corps Training Centre (Active)
- CACTCR
- Canadian Armoured Corps Training Centre Reserve
- CACTE
- Canadian Armoured Corps Training Establishment
- CACTR
- Canadian Armoured Corps Training Regiment
- CACTS
- Canadian Armoured Corps Training Squadron
- CACTSR
- Canadian Armoured Corps Trained Soldiers Regiment
- CACTU
- Canadian Armoured Corps Training Unit
- CADC
- Canadian Army Dental Corps - corps of military dentists and other personnel providing dental services to soldiers
- Cadets
- Cadet Services (Directorate of Military Training)
- CADIS
- Canadian Armoured Division Intelligence Section
- CADMS
- Canadian Advance Depot Medical Stores
- CADOFPRCOC
- Canadian Armoured Division Ordnance Field Park, Royal Canadian Ordnance Corps
- CADPAT
- Canadian Disruptive Pattern
- CADPUCPC
- Canadian Armoured Division Postal Unit, Canadian Postal Corps
- CADR(ER)CAC
- Canadian Armoured Delivery Regiment (Elgin Regiment), Canadian Armoured Corps
- CADRCASC
- Canadian Armoured Division, Royal Canadian Army Service Corps
- CADRSSRCCS
- Canadian Armoured Delivery Regiment Signal Section, Royal Canadian Corps of Signals
- CADRTC
- Canadian Armoured Division Reinforcement Transit Camp
- CADSCDC
- Canadian Army Dental Stores, Canadian Dental Corps
- CADSGCRCASC
- Canadian Armoured Divisional Support Group, Royal Canadian Army Service Corps
- CADSP
- Canadian Armoured Division Sub Park
- CADTCRCASC
- Canadian Armoured Division Transport Company, Royal Canadian Army Service Corps
- CADTS
- Canadian Armoured Division Training School
- CADU
- Canadian Army Demonstration Unit
- CADW/SRCOC
- Canadian Armoured Division Workshop, Royal Canadian Ordnance Corps
- CAEBTC
- Canadian Army Engineer Basic Training Centre
- CAEC(B&NY)
- Canadian Army Enlistment Centre (Boston and New York)
- CAESU
- Canadian Army Equipment Selection Unit
- CAFAC
- Commander, Allied Force, Aruba and Curacao (U.S.)
- CAFHSR-CAMC
- Canadian Army Field Hygiene Section, Royal Canadian Army Medical Corps
- CAFO
- Confidential Admiralty Fleet Order
- CAFRSSRCS
- Canadian Army Field Regiment Signal Section, Royal Canadian Signals
- CAFSS
- Canadian Army Field Security Section
- CAFVS
- Canadian Armoured Fighting Vehicles School
- CAFVTC
- Canadian Armoured Fighting Vehicles Training Centre
- CAG
- Canadian Artillery Group
- CAGRE
- Commander, Army Group Royal Engineers
- CAGS
- Canadian Army Gymnastic Staff
- CAHC
- Canadian Army Hydrological Corps
- CAHQDC(RMR)
- Canadian Army headquarters Defence Company (Royal Montreal Regiment)
- CAHU
- Canadian Artillery Holding Unit
- CAIB
- Canadian Army Identification Bureau
- CAIPCIC
- Canadian Army Interrogation Pool, Canadian Infantry Corps
- CAIS
- Canadian Army Intelligence Section
- CALE
- Canadian Army Liaison Establishment
- CalgH
- Calgary Highlanders
- CalgR
- Calgary Regiment
- CALO
- Command Amenities Liaison Officer
- CALS
- Canadian Air Liaison Section
- CAM
- Catapult Aircraft Merchant Vessel
- CAMB
- Central Air Medical Board
- CambR
- Cambridgeshire Regiment
- CAMBU
- Canadian Army Mobile Bath Unit
- CAMC
- Canadian Army Medical Corps - corps of military doctors, nursing sisters and other personnel providing medical treatment to soldiers
- CAMCTC
- Canadian Army Medical Corps Training Centre
- CA-MCURCAMC
- Canadian Anti-Malaria Control Unit, Royal Canadian Army Medical Corps
- CAMMS
- Canadian Army Motor Mechanic School
- CamnHighs
- Cameron Highlanders
- CAMS
- Catapult Aircraft Merchant Ships
- CAMSI
- Confidential Admiralty Merchant Shipping Instructions
- Can
- Canadian
- Canavhed
- Canadian Naval Headquarters
- CanCavBde
- Canadian Calvary Brigade
- CanCycBn
- Canadian Cyclist Battalion
- CanCyclistBn
- Canadian Cyclist Battalion
- Cand W
- Cable and Wireless Company
- CanDCyc
- Canadian Divisional Cyclists
- CanDivCav
- Canadian Divisional Calvary
- CanDivCyc
- Canadian Divisional Cyclists
- CanDivHQ
- Canadian Divisional Headquarters
- CanDivSig
- Canadian Divisional Signals
- CanEng
- Canadian Engineers
- CanFdArt
- Canadian Field Artillery
- CanForC
- Canadian Forestry Corps
- CanForGen
- Canadian Forces General Order
- CanFus
- Canadian Fusiliers
- CanHighComm
- Canadian High Commissioner
- CanHyBy
- Canadian Heavy Battery
- CanInfBde
- Canadian Infantry Brigade
- CanInfWksC
- Canadian Infantry Works Corps
- CanLabrBn
- Canadian Labour Battalion
- CanLH
- Canadian Light Horse
- CANMIL
- Canadian Military Headquarters
- CANMILITRY
- Canadian Military Headquarters
- CanMMGBde
- Canadian Machine Gun Brigade
- CanMtdRif
- Canadian Mounted Rifles
- CanordC
- Canadian Ordnance Corps
- CanPnrBn
- Canadian Pioneer Battalion
- CanPostalC
- Canadian Postal Corps
- CanRemtD
- Canadian Remount Depot
- CanRlyConsC
- Canadian Railway Construction Corps
- CanSanSec
- Canadian Sanitary Section
- CanScts
- Canadian Scouts
- CanSiberianExpFce
- Canadian Siberian Expeditionary Force
- CanTankC
- Canadian Tank Corps
- CAO
- Canadian Army Order
- CAO
- Canadian Army Overseas
- CAO
- Command Account Officer
- CAO(s)
- Canadian Army Orders
- CAOC
- Canadian Army Ordnance Corps
- CAOF
- Canadian Army Occupation Force
- CAOFP
- Canadian Army Ordnance Field Park
- CAOPS
- Canadian Air Observation Post Squadron
- CAORG
- Canadian Army Operational Research Group
- CAORO(s)
- Canadian Army Overseas Routine Order(s)
- Cap
- Captain
- CAP
- Canadian Army Projectionist
- CAP
- Common Army Phase
- CAP
- Corps Ammunition Park Royal Canadian Army Service Corps
- CAPC
- Canadian Army Pay Corps
- CAPCRCAC
- Canadian Armoured Personnel Carrier Regiment, Canadian Armoured Corps
- CAPCRSTRCS
- Canadian Armoured Personnel Carrier Regiment Signal Troop, Royal Canadian Signals
- CAPF
- Canadian Army Pacific Force
- CapINF
- Capitaine Infirmiere
- CAPIS
- Canadian Air Photo Interpretation Section, Canadian Intelligence Corps
- CAPO
- Canadian Army Post Office
- CAPPUCIC
- Canadian Army Photo Processing Unit, Canadian Intelligence Corps
- CAPRCASC
- Corps Ammunition Park Royal Canadian Army Service Corps
- CAPS
- Canadian Army Pay Services
- CAPS
- Captain, Auxiliary Patrol, Scapa
- Capt
- Captain
- Capt(D)
- Captain (Destroyers)
- CAPTI/C
- Captain-in-Charge
- CAPTMLC
- Captain, Major Landing Craft
- CAPU
- Canadian Army Postal Unit
- CAR
- Canadian Airborne Regiment
- CAR
- Canadian Armoured Regiment
- CAR
- Canadian Army Representative
- CAR
- Carpenter
- CAR(CR)
- Canadian Armoured Regiment (Calgary Regiment)
- CARADSFR
- Canadian Armoured Regiment Advance Details Sherbrooke Fusiliers Regiment
- CARBRCA
- Canadian Army Radar Battery Royal Canadian Artillery
- CARC
- Canadian Army Recovery Company
- CARCRCOC
- Canadian Army Recovery Company, Royal Canadian Ordnance Corp
- CARD
- Canadian Artillery Reinforcement Depot
- CARDE
- Canadian Armament Research Development Establishment
- CareerTrg
- Career Training
- CARFTU
- Canadian Artillery Reinforcement Unit
- CARIB
- Caribbean (U.S.)
- CARIBSEAFRON
- Caribbean Sea Frontier (U.S.)
- CARNBH
- Canadian Armoured Regiment New Brunswick Hussars
- CARO(s)
- Canadian Army Routine Order(s)
- Carp
- Carpenter
- Carpr
- Carpenter
- CARR(GGHG)
- Canadian Armoured Recce Regiment (Governor General's Horse Guards)
- CARTC
- Canadian Army Rehabilitation Training Centre
- CartDmn
- Cartographic Draughtsman
- Cartymn
- Chief Artilleryman
- CARU
- Canadian Army Reinforcement Unit
- Cas
- Casualty (ies)
- CAS
- Canadian Administration School
- CAS
- Canadian Army Shows
- CAS
- Canadian Army Staff
- CAS
- Canadian Artillery School
- CAS
- Chief of the Air Staff
- CASC
- Canadian Air Support Control
- CASC
- Canadian Army Service Corps - branch of the military responsible for supplying troops in the field
- CASCIC
- Censorship Advisory Section, Canadian Intelligence Corps
- CASCRCE
- Canadian Air Survey Company Royal Canadian Engineers
- CASCRU
- Canadian Army Service Corps Reinforcement Unit
- CASDRCASC
- Canadian Advance Stationary Depot, Royal Canadian Army Service Corps
- CASEU
- Canadian Auxiliary Service Entertainment Unit
- CASF
- Canadian Active Service Force
- CASofI
- Canadian Army School of Instruction
- CASofI
- Coast Artillery School of Instruction
- CASS
- Canadian Auxiliary Services Section
- CASSU
- Canadian Air Support Signal Unit
- CASSURCCS
- Canadian Air Support Signal Unit, Royal Canadian Corps of Signals
- CATB
- Canadian Army Tank Brigade
- CATBCRCASC
- Canadian Army Tank Brigade Company, Royal Canadian Army Service Corps
- CATBHSC
- Canadian Army Tank Brigade Heavy Support Company
- CATBn
- Canadian Army Tank Battalion
- CATBS
- Canadian Army Tank Brigade Signals
- CATBSPRCOC
- Canadian Army Tank Brigade Sub Park, Royal Canadian Ordnance Corps
- CATC
- Canadian Army Training Centre
- CATCAC
- Canadian Army Troop, Canadian Armoured Corps
- CATCCRCASC
- Canadian Assault Troops Composite Company, Royal Canadian Army Service Corps
- CATCRCASC
- Canadian Administrative Transport Company, Royal Canadian Army Service Corps
- CATM
- Canadian Army Training Memorandum
- CATOFP
- Canadian Army Tank Ordnance Field Park
- CATR
- Canadian Army Tank Regiment
- CATS
- Canadian Army Tank School
- CATS
- Canadian Army Training School
- CATW/SRCOC
- Canadian Armoured Troops Workshop, Royal Canadian Ordnance Corps
- CAU
- Canadian Administration Unit
- CAU
- Civil Affairs Unit
- CAUC
- Canadian Army University Course
- Cav
- Cavalry - soldiers who fought on horseback
- CAVC
- Canadian Army Veterinary Corps
- CAW
- Canadian Army Staff, Washington
- CAWC
- Canadian Artizan Works Company, Royal Canadian Engineers
- CB
- Coast Brigade
- CB
- Companion of the Order of the Bath
- CB
- Confidential Book
- CB
- Confined to Barracks
- CB
- Order of the Bath (Companion)
- CBA
- Canadian Broadcasting Corporation Broadcasting Station
- CBBDB
- Camp Borden Branch Detention Barracks
- CBC
- Canadian Broadcasting Corporation
- CBD
- Canadian Base Depot
- CBD
- Canadian Base Details - small units charged with maintaining and improving camp areas
- CBDC
- Canadian Base Dental Company
- CBDCMSC
- Camp Borden Detachment, Corps of Military Staff Clerks
- CBDMSRCAMC
- Canadian Base Depot Medical Stores, Royal Canadian Army Medical Corps
- CBDRCOC
- Camp Borden Details, Royal Canadian Ordnance Corps
- CBDSCDC
- Canadian Base Dental Stores, Canadian Dental Corps
- CBE
- Commander of the Order of the British Empire
- CBE
- Order of the British Empire (Commander)
- CBG
- Canadian Brigade Group
- CBH(RB)
- Cape Breton Highlanders (Rifle Battalion)
- CBHQS
- Camp Borden Headquarters Staff
- CBMHRCAMC
- Camp Borden Military Hospital, Royal Canadian Army Medical Corps
- CBMHRCAMC
- Coteau Barracks Military Hospital, Royal Canadian Army Medical Corps
- CBMHRCAMC
- Currie Barracks Military Hospital, Royal Canadian Army Medical Corps
- CBOD
- Canadian Base Ordnance Depot
- CBOI(ACSRRCA)
- Canadian Base Ordnance Increment (Attached Canadian Survey Regiment, Royal Canadian Artillery)
- CBOSRCA
- Counter Battery Officers Staff, Royal Canadian Artillery
- CBOSRCACC
- Counter Battery Officers Staff, Royal Canadian Artillery, Canadian Corps
- CBOStaff
- Counter Battery Officers Staff
- CBOW/SRCOC
- Canadian Base Ordnance Workshop, Royal Canadian Ordnance Corps
- CBP
- Canadian Base Park
- CBPRCE
- Canadian Base Park, Royal Canadian Engineers
- CBRCA
- Centaur Battery, Royal Canadian Artillery
- CBRCA
- Coast Battery, Royal Canadian Artillery
- CBRD
- Canadian Base Reinforcement Depot
- CBRG
- Canadian Base Reinforcement Group
- CBRGSofCRCACS
- Canadian Base Reinforcement Group School of Cookery, Royal Canadian Army Service Corps
- CBSC
- Canadian Base Staging Camp
- CBSO
- Counter Battery Staff Officer
- CBSRCASC
- Canadian Barracks Services, Royal Canadian Army Service Corps
- CBSS(CMF)
- Canadian Base Signal Section (Central Mediterranean Force)
- CBSSRCCS
- Camp Borden Signal Section, Royal Canadian Corps of Signals
- CBTC
- Canadian Base Transport Company
- CBTD
- Canadian Base Transit Depot
- CBTPRCASC
- Canadian Base Transport Platoon, Royal Canadian Army Service Corps
- CBU
- (Headquarters) Canadian Base Unit
- CBUCCRCE
- Canadian Base Units Construction Company, Royal Canadian Engineers
- CC
- Camouflage Course
- CC
- Camp Commandant Royal Canadian Air Force Headquarters
- CC
- Canadian Corps
- CC
- Cancellations & Corrections
- CC
- Chief Constructor
- CC
- Civil Convictions
- CC
- Clerk's Course
- CC
- Communicator ( C )
- CC
- Companion of the Order of Canada
- CC
- Conditioning Centre
- CC&A-AAS
- Canadian Coast & Anti-Aircraft Artillery School
- CC&ATSPRCOC
- Canadian Corps & Army Troops Sub Park, Royal Canadian Ordnance Corps
- CCAC
- Canadian Casualty Assembly Centre - centre where wounded were assessed for either further treatment or return to duty
- CCACS
- (Construction), Company Atlantic Command Signals
- CCAS
- Canadian Coast Artillery School
- CCAS
- S-1 Victoria
- CCAS
- S-2 Petawawa
- CCB
- Canadian Calvary Brigade
- CCB
- Canadian Cyclist Battalion
- CCB
- Combined Communications Board
- CCBMGS
- Canadian Cavalry Brigade Machine Gun Squadron
- CCBPNo
- Combined Communications Board, Publication Number
- CCC
- Canadian Construction Company
- CCC
- Casualty Clearing Centre
- CCC
- Commonwealth Communications Council
- CCCC
- Canadian Corps Composite Company - unit of men unfit for active duty at the front and attached to Corps Headquarters for employment
- CCCC
- Cape Colony Cyclist Corps
- CCCCRCASC
- Canadian Corps Car Company, Royal Canadian Army Service Corps
- CCCRCE
- Canadian Construction Company, Royal Canadian Engineers
- CCCS
- Canadian Casualty Clearing Station
- CCCS
- Captain (later Commodore) Commanding Canadian Ships and Establishments in the United Kingdom
- CCCTRCASC
- Canadian Command Corps Troops, Royal Canadian Army Service Corps
- CCCU
- Canadian Cemetery Construction Unit
- CCD
- Canadian Command Depot
- CCD
- Canadian Convalescent Depot - facility where soldiers could recover from wounds and rebuild their strength
- CCD
- Canadian Corps Depot
- CCDC
- Canadian Corps Defence Company
- CCDRCAMC
- Canadian Convalescent Depot, Royal Canadian Army Medical Corps
- CCDSSTRCCS
- Canadian Corps Delivery Squadron Signal Troop, Royal Canadian Corps of Signals
- CCDU
- Coastal Command Development Unit
- CCERCE
- Canadian Constructional Engineers, Royal Canadian Engineers
- CCF
- Commander Coastal Forces
- CCFC
- Company Canadian Forestry Corps
- CCFCORCAPC
- Canadian Corps Field Cash Office, Royal Canadian Army Pay Corps
- CCFPC
- Canadian Corps Field Park Company
- CCFPC
- Canadian Corps Field Punishment Camp
- CCHA
- Canadian Corps Heavy Artillery
- CCIS
- Canadian Corps Intelligence Section
- CCM
- Canadian Centennial Medal (1967)
- CCM
- Combined Cypher Machine
- CCM&HC
- Canadian Courts Martial & Holding Centre
- CCMA
- Canadian Corps Medium Artillery
- CCMHQSRCS
- Company Canadian Military Headquarters Signals, Royal Canadian Signals
- CCMOS
- Canadian Counter Mortar Officers Staff
- CCMOSRCA
- Canadian Counter Mortar Officer Staff, Royal Canadian Artillery
- CCMSRCA
- Canadian Corps Meteorological Section, Royal Canadian Artillery
- CCNF
- Commodore Commanding Newfoundland Force
- CCO
- Chief of Combined Operations
- CCO
- Civilian Contracts Officer, Joint Air Training Plan
- CCO
- Coder and Cypher Office
- CCO
- Communications, Coding and Cyphering Arrangements
- CCOD
- Canadian Central Ordnance Depot
- CCOS
- Combined Chiefs of Staff
- CCP
- Casualty Clearing Post
- CCPC
- Company Canadian Provost Corps
- CCPPRCASC
- Canadian Corps Petrol Park, Royal Canadian Army Service Corps
- CCPS
- Computerized Central Pay System
- CCPU
- Canadian Corps Postal Unit
- CCPU
- Canadian Corps Protective Company
- CCR(C)A
- Commander Corps Royal (Canadian) Artillery
- CCRA
- Commander Corps, Royal Artillery
- CCRC
- Canadian Corps Reinforcement Camp - centre in France where troops were held before being sent to reinforce existing units
- CCRCAMC
- Conditioning Centre, Royal Canadian Army Medical Corps
- CCRCASC
- Composite Company, Royal Canadian Army Service Corps
- CCRTC
- Canadian Corps Reinforcement Transit Camp
- CCRU
- Canadian Combined Reinforcement Unit
- CCS
- Canadian Censor Section
- CCS
- Canadian Chaplain Services
- CCS
- Casualty Clearing Station - first medical unit (after the Aid Post) for wounded soldiers evacuated from the front lines
- CCS
- Code and Cypher School
- CCS
- Combined Chiefs of Staff
- CCSO
- Contraband Control Service Officer
- CCSRCCS
- Canadian Cipher Section, Royal Canadian Corps of Signals
- CCSRCS
- Canadian Corps Signals, Royal Canadian Signals
- CCT
- Canadian Calibration Troop
- CCTC
- Canadian Corps Transport Company
- CCTC
- Commandant, Combined Training Centre
- CCTCC
- Canadian Corps Troops Carrying Column
- CCTCCRCASC
- Commander Corps Troops Carrying Column, Royal Canadian Army Service Corps
- CCTORCOC
- Canadian Corps Troops Ordnance, Royal Canadian Ordnance Corps
- CCTSI
- Canadian Corps Troops Service Increment
- CCTW/SRCEME
- Canadian Corps Troops Workshop, Royal Canadian Electrical and Mechanical Engineers
- CCTW/SRCOC
- Canadian Corps troops Workshop, Royal Canadian Ordnance Corps
- CCU
- Canadian Concentration Unit
- CCWAC
- Company Canadian Women's Military Corps
- CCWACMD
- Company Canadian Women's Army Corps Military Corps
- CCWDL
- Canadian Chemical Warfare Defence Laboratory
- CCWS
- Canadian Chemical Warfare School
- CCZ
- Canadian Coastal Zone
- CD
- Canada Draft
- CD
- Canadian Forces Decoration
- CD
- Captain of the Dockyard
- CD
- Clearance Diver
- CD
- Coast Defence (Artillery)
- CD
- Commissioned
- CD
- Convalescent Detachments
- CD&AA
- Coast Defence & Anti-Aircraft
- CD&AAATC
- Coast Defence & Anti-Aircraft Artillery Training Centre
- CD&AAW/SS
- Coast Defence & Anti-Aircraft Workshop Section
- CD&EP
- Canadian Defence & Employment Platoon
- CD&FPB
- Canadian Detention and Field Punishment Barracks
- CD&MS
- Canadian Driving and Maintenance School
- CD(Records)
- Correction on Documents
- CDA
- Canadian Divisional Artillery
- CDAC
- Canadian Divisional Ammunition Column - railhead where divisional ammunition was stored before being shipped to the front
- CDB
- Canadian Detention Barracks
- CDB
- Coast Defence Battery
- CDBPRCE
- Canadian Divisional Bridging Platoon, Royal Canadian Engineers
- CDC
- Canadian Dental Corps
- CDC
- Canadian Disciplinary Centre
- CDC
- Canadian Divisional Calvary
- CdCkO
- Commissioned Cookery Officer
- CDCRCE
- Canadian Drilling Company, Royal Canadian Engineers
- CdCtO
- Commissioned Catering Officer
- CDD
- Canadian Discharge Depot - centre in Canada where soldiers returning from war were released from service
- CDE
- Code
- CdeG
- Croix de Guerre
- CdeG(B)
- Croix de Guerre Belgium
- CdeG(F)
- Croix de Guerre France
- CdEl
- Commissioned Electrician
- CdEng
- Commissioned Engineer
- CdG'nr
- Commissioner Gunner
- CDHQ
- Canadian Divisional Headquarters
- CDIS
- Canadian Division Intelligence Section
- CDISRCASC
- Canadian Detail Issue Depot, Royal Canadian Army Service Corps
- CDLS
- Canadian Defence Liaison Staff
- CDMD
- Canada Draft Military District
- Cdn
- Canadian
- CdnConstlEngrs
- Canadian Constructional Engineers
- CdnEngrs
- Canadian Engineers
- Cdn-Gds
- Canadian Guards
- CDOF
- French Western Africa colony
- CDofDS
- Canadian Depot of Dental Stores
- CDOSC
- Camp Daily Orders Sarcee Camp
- CDOW/SRCOC
- Canadian Divisional Ordnance Workshop, Royal Canadian Ordnance Corps
- CDPU
- Canadian Division Postal Unit
- Cdr
- Coder
- Cdr
- Commander
- Cdr(D)
- Commander (Destroyers)
- CDRAS&TD
- Canadian Detachment Royal Armoured Corps School & Training Depot
- CDRBCAO/S
- Canadian Division Reece Battalion, Canadian Army Overseas
- CDRE
- Commodore
- CDRJ
- Commander, Force J.
- CDRSRCS
- Canadian Despatch Rider Section Royal Canadian Signals
- CDS
- Canadian Divisional Signals
- CDS
- Chief of the Defence Staff
- CDSB
- Canadian Division Support Battalion
- CDSB
- Commissioned Signal Boatswain
- CDSCCRC
- Canadian Division Section - Canadian Corps Reinforcement Camp
- CDSCDC
- Central Dental Stores, Canadian Dental Corps
- CDSCRCASC
- Canadian Division Supply Company, Royal Canadian Army Service Corps
- CdShpt
- Commissioned Shipwright
- CdSO
- Commissioned Stores Officer
- CDSRC
- Canadian Division Section Reinforcement Camp
- Cdt
- Cadet
- CDT
- Commissioned Telegraphist
- CDTCRCASC
- Canadian Division Troops Company, Royal Canadian Army Service Corps
- CdTelegr
- Cadet Telegraphist
- CDTS
- Canadian Divisional Training School
- CDVGofCCMHQ
- General Duty Veterans Guard of Canada, Canadian Military Headquarters
- CdWO
- Commissioned Writer Officer
- CE
- Canadian Engineers - corps of men who built bridges, railway depots, camps, bases and other military installations
- CE
- Chief Engineer
- CE
- Civil Engineer
- CE&MPRCE
- Canadian Electrical & Mechanical Platoon, Royal Canadian Engineers
- CE&MSRCE
- Canadian Electrical & Mechanical Section, Royal Canadian Engineers
- CE(Wks)
- Chief Engineer (Works)
- CEA
- Chief Electrical Artificer
- CEAURCOC
- Canadian Equipment Assembly Unit, Royal Canadian Ordnance Corps
- CEC
- Corps expéditionnaire canadien (French only) - force of more than 600,000 men established by the Government of Canada for service overseas
- CEEW(A)RCEME
- Canadian Engineer Equipment Workshop (Active), Royal Canadian Electrical and Mechanical Engineers
- CEEW/SRCEME
- Canadian Engineer Equipment Workshop, Royal Canadian Electrical and Mechanical Engineers
- CEEW/SRCOC
- Canadian Engine Equipment Workshop, Royal Canadian Ordnance Corps
- CEF
- Canadian Expeditionary Force - force of more than 600,000 men established by the Government of Canada for service overseas
- CEG(B)
- Canadian Employment Group "B"
- CEHU
- Canadian Engineer Holding Unit
- CELE
- Communications/Electronics Engineer
- CEO
- Camp Engineer Officer
- CEO
- Command Engineer Officer
- CEP
- Canadian Employment Platoon
- CEPF
- Canadian Echelon Pacific Force
- CERA
- Chief Engine Room Artificer
- CERD
- Canadian Engineer Reinforcement Depot - centre from which reinforcements were allocated to existing engineering units
- CERU
- Canadian Engineer Reinforcement Unit
- CESF
- Commander, Eastern Sea Frontier (U.S.)
- CESU
- Canadian Educational Services Unit
- CETC
- Canadian Engineer Training Centre
- CETech
- Construction Engineering Technician
- CEURCAMC
- Canadian Exhaustion Unit, Royal Canadian Army Medical Corps
- CeylonPLRC
- Ceylon Planters Rifle Corps
- CF
- Canadian Forces
- CF
- Canadian Fusiliers
- CF
- Composite Flights
- CF&PS
- Canadian Film and Photo Section
- CF(SP)RRCA
- Canadian Field (Self Propelled) Regiment, Royal Canadian Artillery
- CF98
- Canadian Forces Form #98 - Report on Injuries
- CFA
- Calvary Field Ambulance
- CFA
- Canadian Field Ambulance - unit responsible for evacuating the wounded from the front lines to medical centres
- CFA
- Canadian Field Artillery - organization responsible for using medium-calibre guns in direct or indirect support of infantry
- CFAO
- Canadian Forces Administrative Order
- CFASS
- Canadian Field Auxiliary Services Section
- CFB
- Coastal Force Base
- CFBMEK
- Coast Force Base, Mers-El-Kebir
- CFBRCA(AF)
- Canadian Field Battery, Royal Canadian Artillery, (Active Force)
- CFC
- Canadian Forces College
- CFC
- Canadian Forestry Corps - units designated to cut down and process trees to provide wood and lumber
- CFC
- Craftsman
- CFCCDRCE
- Canadian Field Company, Canadian Division, Royal Canadian Engineers
- CFCRCE
- Canadian Field Company, Royal Canadian Engineers
- CFCSC
- Canadian Forces Command and Staff Course
- CFCTW
- Canadian Forestry Corps Training Wing
- CFDS
- Canadian Field Dressing Station
- CFDSRCAMC
- Canadian Field Dressing Station, Royal Canadian Army Medical Corps
- CFE
- Commander, Coastal Forces, Eastern Mediterranean
- CFEF
- Canadian Far East Force
- CFES
- Canadian Field Educational Section
- CFF
- Communication and Ferry Flights
- CFF
- Corps of Civilian (Canadian) Fire Fighters For Service in the United Kingdom
- CFFS
- Canadian Forces Fleet School
- CFFT
- Coastal Forces Fuelling Tender
- CFH
- Canadian Field Hospital
- CFH
- Canadian Forces Hospital
- CFHA
- Canadian Forces Housing Agency
- CFHS
- Canadian Field Historical Section
- CFHSvcsGp
- Canadian Forces Health Services Group
- CFL
- Compassionate Farm Leave
- CFMG
- Canadian Forces Medical Group
- CFMSO
- Coastal Forces Material Supply Officer
- CFMTP
- Canadian Forces Musician Training Plan
- Cfn
- Craftsman
- Cfn
- Craftsman (Royal Canadian Electrical and Mechanical Engineers)
- CFN
- Canadian Forces in the Netherlands
- CFNIS
- Canadian Forces National Investigation Service
- CFOCS
- Canadian Forces Officer Candidate School
- CFORS
- Course for Orderly Room Sergeants
- CFP
- Canadian Forces Publication
- CFPAS
- Canadian Forces Personnel Appraisal System
- CFPC
- Canadian Field Punishment Camp
- CFPCRCE
- Corps Field Park Company, Royal Canadian Engineers
- CFPCUCIC
- Canadian Field Press Censor Unit, Canadian Intelligence Corps
- CFPSA
- Canadian Forces Personnel Support Agency
- CFR
- Commissioning From the Ranks
- CFRC
- Canadian Forces Recruiting Centre
- CFRETS
- Canadian Forces Recruiting, Education and Training System
- CFRP
- Commissioning from the Ranks Plan
- CFRRCAAP
- Canadian Field Regiment, Royal Canadian Artillery, Advance Party
- CFS
- Canadian Field Squadron
- CFS
- Central Flying Schools
- CFSC
- Canadian Field Survey Company
- CFSCRCE
- Canadian Field Survey Company, Royal Canadian Engineers
- CFSD
- Canadian Forces Supply Depot
- CFSEME
- Canadian Forces School of Electrical and Mechanical Engineering
- CFSRD
- Canadian Field Security Reserve Detachment
- CFSS
- Canadian Field Security Section
- CFSURCAMC
- Canadian Field Surgical Unit, Royal Canadian Army Medical Corps
- CFTC(ID)RCASC
- Canadian General Transport Company (Infantry Division), Royal Canadian Army Service Corps
- CFTO
- Canadian Forces Technical Order
- CFTSHQ
- Canadian Forces Training System Headquarters
- CFTU
- Canadian Field Transfusion Unit
- CFW
- Commander, Coastal Forces, Western Mediterranean
- CG
- Canada Gazette
- CG
- Coldstream Guards
- CG
- Commanding General (U.S.)
- CG
- Compassionate Grounds
- CGA
- Canadian Garrison Artillery - organization responsible for using large-calibre guns against heavily fortified positions
- CGB
- Canadian Garrison Battalion
- CGBD
- Canadian General Base Depot
- CGBRB
- Canadian General Base Reinforcement Battalion
- CGCU
- Canadian Graves Concentration Unit
- Cgds
- Coldstream Guards
- CGG
- Canadian Grenadier Guards (Now 22nd Armoured Regiment)
- CGH
- Canadian General Hospital - permanent hospital where extensive treatment was given to the wounded
- CGHRCAMC
- Canadian General Hospital, Royal Canadian Army Medical Corps
- CGHU
- Canadian General Holding Unit
- CGLS
- Canadian General Labour Section
- CGM
- Conspicuous Gallantry Medal
- CGMU
- Combat Group Medical Unit
- CGPC
- Canadian General Pioneer Company
- CGR
- Canadian Garrison Regiment - unit of 13 battalions formed in April 1918 to perform garrison duty in Canada's 13 military districts
- CGR
- Canadian Graves Registrar or Registration
- CGRU
- Canadian General Reinforcement Unit
- CGRU
- Canadian Graves Registration Unit
- CGS
- Canadian Government Ship
- CGS
- Chief of the General Staff
- CGS
- Chief of the Imperial General Staff
- CGSF
- Commander Gulf Sea Frontier
- CGTC
- Canadian General Transport Company
- CGTWRCEME
- Canadian General Troop Workshop, Royal Canadian Electrical and Mechanical Engineers
- CH
- 14th Canadian Hussars
- CH
- Chaplain
- CH
- Chatham Division, Royal Marines
- CH
- Companion Of Honour
- CH
- Construction Hand
- CH
- Convalescent Hospital
- Chap
- Chaplain
- CHAP
- Canadian Harassment and Abuse Prevention
- Chap(F)
- Chaplain of the Fleet
- Chap(P)
- Chaplain (Protestant)
- Chap(RC)
- Director of Chaplain Services (Roman Catholic)
- CHB
- Canadian Highland Battalion (Black Watch Royal Highland Regiment of Canada)
- CHD
- Calgary Highlanders Depot
- CHENG
- Chief Engineer
- ChesR
- Cheshire Regiment
- ChesYeo
- Cheshire Yeomanry
- CHET
- Canadian Higher Education Test
- ChO
- Chief Officer
- CHofO(MG)
- Cameron Highlanders of Ottawa (Machine Gun)
- CHOP
- Line near 47th Meridian dividing the British and Canadian areas of responsibility
- CHP
- Chaplain (Protestant)
- CHQ&NDHQCRCAMC
- Corps Headquarters & National Defence Headquarters Company, Royal Canadian Army Medical Corps
- CHQAGRCE
- Canadian Headquarters Army Group, Royal Canadian Artillery
- CHQCDC
- Corps Headquarters, Canadian Dental Corps OR Canadian Disciplinary Centre
- CHQCPC(C)
- Corps Headquarters Canadian Postal Corps (Canada)
- CHQCWAC
- Corps Headquarters Canadian Women's Army Corps
- CHQEOFSCRCOC
- Corps Headquarters Element of Salvage Control, Royal Canadian Ordnance Corps
- CHQofBSA
- Canadian Headquarters of Base Sub Area
- CHQPMC
- Camp Headquarters, Petawawa Military Camp
- CHQRCECA
- Corps Headquarters Royal Canadian Engineers, Canadian Army
- CHQRCEME
- Corps Headquarters Royal Canadian Electrical and Mechanical Engineers
- CHQRCOC
- Corps Headquarters, Royal Canadian Ordnance Corps
- CHQSDRCOC
- Canadian Headquarters Salvage Depot, Royal Canadian Ordnance Corps
- CHRA
- Canadian Human Rights Act
- CHRC
- Canadian Human Rights Commission
- CHRC
- Chaplain Roman Catholic
- CHRSRCEME
- Canadian Heavy Recovery Section, Royal Canadian Electrical and Mechanical Engineers
- CHRSRCOC
- Canadian Heavy Recovery Section, Royal Canadian Ordnance Corps
- CHS
- Canadian Hospital Ship
- CHSB
- Chief Signal Botswain
- CHSHPT
- Chief Shipwright
- ChSkr
- Chief Skipper
- CHT
- Corps of Horse Transport
- CHU
- Canadian Holding Unit
- CHWR
- Chief Writer
- CHYeoSIG
- Chief Yeoman of Signals
- CI(I)HQS
- Canadian Intelligence (Interrogation) Headquarters Section
- CIA
- Chief Inspector of Armaments
- CIAL
- Commercial Cable Company
- CIB
- Canadian Infantry Brigade
- CIBC
- Canadian Infantry Corps Band
- CIBCRCASC
- Canadian Infantry Brigade Company, Royal Canadian Army Service Corps
- CIBGDP(LS)
- Canadian Light Infantry Brigade Ground Defence Platoon (Lorne Scot)
- CIBRB
- Canadian Infantry Base Reinforcement Battalion
- CIBSG(SLI)
- Canadian Infantry Brigade Support Group (Saskatoon Light Infantry)
- CIBUS
- Communication Instructions for British Warships in the U.S.A.
- CIBW/S
- Canadian Infantry Brigade Workshop (Royal Canadian Ordnance Corps or Royal Canadian Electrical and Mechanical Engineers)
- CIBW/SRCEME
- Canadian Infantry Brigade Workshop, Royal Canadian Electrical and Mechanical Engineers
- CIBW/SRCOC
- Canadian Infantry Brigade Workshop, Royal Canadian Ordnance Corps
- CIC
- Cadet Instructor Cadre
- CIC
- Canadian Infantry Corps
- CIC
- Canadian Intelligence Corps
- CIDB
- Canadian Infantry Depot Battalion
- CIDBn
- Canadian Infantry Depot Battalion
- CIDCC(M)RCASC
- Canadian Infantry Division Composite Company (Main), Royal Canadian Army Service Corps
- CIDCMOS
- Canadian Infantry Division Ordnance Field Park, Royal Canadian Ordnance Corps
- CIDM/GBn(SLI)
- Canadian Infantry Division Machine Gun Battalion (Saskatoon Light Infantry)
- CIDOFPRCOC
- Canadian Infantry Division Ordnance Field Park, Royal Canadian Ordnance Corps
- CIDRTC
- Canadian Infantry Division Reinforcement Transit Camp
- CIDSI
- Canadian Infantry Division Service Increment
- CIDSPRCOC
- Canadian Infantry Division Sub Park, Royal Canadian Ordnance Corps
- CIDTCRCASC
- Canadian Infantry Division Troops Company, Royal Canadian Army Service Corps
- CIDTS
- Canadian Infantry Division Training School
- CIET
- Canadian Intermediate Education Test
- CIET
- Canadian Intermediate Educational Test
- CIF
- "C" Infantry Battalion
- CIGS
- Chief of the Imperial General Staff
- CIHU
- Canadian Infantry Holding Unit
- CIL
- Cadet Instructors List
- CIMGCoy(NBR)
- Canadian Independent Machine Gun Company (New Brunswick Regiment)
- Cin CCNA
- Commander in Chief, Canadian North West Atlantic
- C-in-C
- Commander in Chief
- C-in-C,CNA
- Commander in Chief, Canadian Northwest Atlantic
- C-in-CAandWI
- Commander in Chief, Atlantic and West Indies Station
- C-in-CCWA
- Commander in Charge Canadian North Atlantic
- C-in-CEF
- Commander in Chief Eastern Fleet
- C-in-CHF
- Commander in Chief Home Fleet
- C-in-CLANT
- Commander in Chief, US Atlantic Fleet
- CInfC
- Canadian Infantry Corps
- CIntC
- Canadian Intelligence Corps
- CIofCM
- Chief Inspector of Catering & Messing
- CIOSPRCOC
- Canadian Infantry Ordnance Sub-Park, Royal Canadian Ordnance Corps
- CIPCIC
- Canadian Interpreters Pool, Canadian Infantry Corps
- CIRU
- Canadian Infantry Reinforcement Unit
- CITB
- Canadian Infantry Training Brigade
- CITC
- Canadian Infantry Centre
- CITC
- Canadian Infantry Training Centre
- CitoanMTIBRCASC
- Canadian Increment to a (Mobilization Training Centre / Mechanical Transport / Military Training OR Movement Train) Inspection Branch, Royal Canadian Army Service Corps
- CITR
- Canadian Infantry Training Regiment
- CITW/SRCEME
- Canadian Infantry Troops Workshop, Royal Canadian Electrical and Mechanical Engineers
- CITW/SRCOC
- Canadian Infantry Troops Workshop, Royal Canadian Ordnance corps
- CIU
- Clinical Investigation Units
- CIWB
- Canadian Infantry Works Battalion
- CIWC
- Canadian Infantry Works Corps
- CJATC
- Canadian Joint Air Training Centre (Rivers, Manitoba)
- CJLS
- Corps Junior Leaders School
- CJWSC
- Canadian Junior War Staff Course
- CK
- Cook
- CK
- Cook (Ship's)
- Ck(O)
- Cook (Officers)
- Ck(Prob)
- Cook (Probationer)
- Ck(S)
- Cook (Seamen)
- CKMTE
- Cook's Mate
- CKS&DU
- Canadian Kit Storage & Disposal Unit
- CKSD
- Canadian Kit Storage Depot
- Cl
- Clasp
- CL
- Canloan List
- CL
- Casualty List - list of soldiers wounded, killed, missing or taken prisoner by the enemy
- CL
- Colonel
- CL
- Compassionate Leave
- CL
- Convalescent Leave
- CLA-AB
- Canadian Light Anti-Aircraft Battalion
- CLB
- Canadian Labour Battalion
- CLC
- Canadian Leave Centre
- CLDAFHQ
- Canadian Liaison Detachment, Allied Forces OR Air Force Headquarters
- CLE
- Clerk
- CLES
- Canadian Legion Educational Service
- CLFCSC
- Canadian Land Force Command and Staff College
- CLFHSRCAMC
- Canadian Light Field Hygiene Sections, Royal Canadian Army Medical Corps
- CLH
- Canadian Light Horse - cavalry unit, originally intended as a scouting force
- CLK
- Clerk
- ClkAcc
- Clerk Accounting
- ClkAdmSupr
- Clerk Administrative Supervisor
- ClkEng
- Clerk Engineering
- ClkGen
- Clerk General
- ClkStats
- Clerk Statistics
- ClkSteno
- Clerk Stenographer
- ClkTyp
- Clerk Typist
- Cloc
- Chief Locator
- ClofCPC(C)
- Canadian Line of Communication Provost Company (Consolidated)
- CLofCT
- Canadian Line of Communication Terminal
- CLP
- Canadian Labour Pool
- CLQ
- Class Qualified
- CLRSRCOC
- Canadian Light Recovery Station, Royal Canadian Ordnance Corps
- CLS
- Chief of the Land Staff
- CL-SE
- Colour Sergeant
- CLURCE
- Canadian Landmark Unit, Royal Canadian Engineers
- CLWS
- Canadian Legion War Services
- CM
- Canadian Centennial Medal (1967)
- CM
- Commissaryman
- CM
- Communicator
- CM
- Member of the Order of Canada
- CM/L
- Controlled Mine Laying
- CMA
- Central Mediterranean Area
- CMACRCASC
- Canadian Motor Ambulance Convoy, Royal Canadian Army Service Corps
- CMASCL
- Canadian Military Attache Staff Canadian Legation
- CMBG
- Canadian Mechanized Brigade Group
- CMBURCAMC
- Canadian Mobile Bath Units, Royal Canadian Army Medical Corps
- CMC
- Canadian Medical Centre
- CMC
- Canadian Military College
- CMCLG
- Canadian Movement Control Liaison Group
- CMCR(PLNBH)AF
- Canadian Motorcycle Regiment (Princess Louise's New Brunswick Hussars) Active Force
- CMCU
- Canadian Movement Control Unit
- CMDBSN
- Commissioner Boatswain
- CMDLondonMD1
- Central Mechanization Depot, Royal Canadian Ordnance Corps
- Cmdr
- Commander
- Cmdr
- Commander (Naval)
- CMEC
- Canadian Mechanical Equipment Company
- CMF
- Central Mediterranean Force
- CMG
- Canadian Medical Group
- CMG
- Companion of the Order of St Michael and St George
- CMG
- Order of St. Michael and St. George (Companion)
- CMGBde
- Canadian Machine Gun Brigade
- CMGC
- Canadian Machine Gun Corps - soldiers with machine guns responsible for supporting or defending against infantry attack
- CMGCMF
- Canadian Meteorological Group - Central Mediterranean Force
- CMGHU
- Canadian Machine Gun Holding Unit
- CMGO
- Corps Machine Gun Officer
- CMGRU
- Canadian Machine Gun Reinforcement Unit
- CMGTC
- Canadian Machine Gun Training Centre
- CMH
- Calgary Military Hospital
- CMH
- Canadian Military Hospital
- CMHL
- Canadian Mobile Hygiene Laboratory
- CMHQ
- Canadian Military Headquarters
- CMHQC
- Canadian Military Headquarters Course
- CMHQROX-LPSOW
- Canadian Military Headquarters Records Office X-List, PSOW
- CMHRCAMC
- Camp Military Hospital, Royal Canadian Army Medical Corps
- CMHRCAMC
- Camrose Military Hospital, Royal Canadian Army Medical Corps
- CMHRCAMC
- Charlottetown Military Hospital, Royal Canadian Army Medical Corps
- CMHRCAMC
- Chatham Military Hospital, Royal Canadian Army Medical Corps
- CMHRCAMC
- Chicoutimi Military Hospital, Royal Canadian Army Medical Corps
- CMHRCAMC
- Chilliwack Military Hospital, Royal Canadian Army Medical Hospital
- CMHRCAMC
- Cornwall Military Hospital, Royal Canadian Army Military Hospital
- CMM
- Order of Merit (Commander)
- CMMG
- Canadian Motor Machine Gun Brigade
- CMMGC
- Canadian Motor Machine Gun Corps
- CMMP
- Corps of Military Mounted Police
- CMMS
- Canadian Motorcycle Maintenance School
- CMN-SURCAMC
- Canadian Mobil Neuro-Surgical Unit, Royal Canadian Army Medical Corps
- CMOS
- Counter Mortar Officer Staff
- CMP
- Corps of Military Police
- CMP&DB
- Canadian Military Prison & Detention Barracks
- CMPC
- Canadian Military Police Corps
- CMPLRCASC
- Canadian Mobile Pet. Laboratories, Royal Canadian Army Service Corps
- CMPS
- Canadian Map Photographic Section
- CMPS
- Canadian Military Police Corps
- CMR
- Collège militaire royal de Saint-Jean
- CMR
- Canadian Mounted Rifles - mounted soldiers originally, later used largely as infantry
- CMR
- Cape Mounted Riflemen
- CMR(GGHG)AF
- Canadian Motorcycle Regiment (Governor General's Horse Guards) Active Force
- CMRCASF(DYRCH)
- Canadian Motorcycle Regiment, Canadian Active Service Force (17th Duke of York's Royal Canadian Hussars)
- CMRPRCASC
- Canadian Medium Regiment Platoon, Royal Canadian Army Service Corps
- CMRS
- Canadian Medical Rest Station
- CMRSRCAMC
- Canadian Medical Rest Station, Royal Canadian Army Medical Corps
- CMS
- Canadian Military Staff
- CMS
- Canadian Mission Staff
- CMSA
- Co-operations with the British Ministry of War Transport in the United States
- CMSC
- Cape Medical Staff Corps
- CMSC
- Co-operations with the British Ministry of War Transport in Canada
- CMSC
- Corps of Military Clerks
- CMSC
- Corps of Military Staff Clerks
- CMSCCO
- Corps of Military Staff, Clerks Corps Orders
- CMSPEC
- Canadian Military Section Port Executive Committee
- CMSTMUSA
- Camp Myles Standish, Tauton Massachusetts, U.S.A.
- CMT
- Corps of Motor Transport, Army Service Corps
- CMTCCM
- Canadian Militia Training Course, Camp Macauley
- CMTech
- Construction and Maintenance Technician
- CMTRCA
- Canadian Modelling Team, Royal Canadian Artillery
- CMTRURCEME
- Canadian Mobile Tire Repair Unit, Royal Canadian Electrical and Mechanical Engineers
- CMTS
- Central Mechanical Transport Stores
- CMU
- Construction and Maintenance Units
- CNCoy
- Cannon Company
- Cnd
- Canadian
- CndDetnBks
- Canadian Detention Barracks
- CNDHQ
- Commandant National Defence Headquarters
- CNE
- Canadian National Exhibition
- CNEC
- Chief Naval Engineering and Construction
- CNES
- Chief Naval Equipment and Supply
- CNK
- Change Next of Kin
- CNMO
- Canadian Naval Mission Overseas
- CNO
- Canadian Naval Order
- CNP
- Chief of Naval Personnel
- CNPWRCAMC
- Canadian Neuro Psychiatric Wing, Royal Canadian Army Medical Corps
- CNR
- Canadian National Railways
- CNR
- Canadian Naval Regulations
- CNS
- Chief of the Naval Staff
- CNSRHRCAMC
- Canadian Nursing Sister's Rest Home, Royal Canadian Army Medical Corps
- CNVT&TU
- Canadian Night Vision Training & Testing Unit
- CNW-44
- Canadian Naval War Plan
- Co
- Company
- CO
- Commanding Officer - any officer in command of a specific unit (usually battalion level and up)
- CO
- Constable
- CO
- Cook (Officer's)
- CO
- Corps Orders
- CO&MERU
- Canadian Ordnance & Mechanical Engineer Reinforcement Unit
- CO(A)
- Camp Orders (Angler)
- CO/SPD
- Canadian Overseas Postal Depot
- COA
- Chief Ordnance Accountant
- COA
- Corps of Ordnance Artificers
- COA
- Course of Action
- COAC
- Commanding Officer Atlantic Coast
- COAV
- Commanding Officer Auxiliary Vessels
- COBD
- Canadian Ordnance Beach Detachment
- COBD
- Canadian Ordnance Branch Detachment
- COC
- Canadian Ordnance Corps
- COC
- Combined Operations Centre
- COC&BTC
- Combined Operations Centre & Basic Training Centre
- COC(AC)
- Combined Operations School (Army Camp)
- COCDC
- Corps Orders, Canadian Dental Corps
- COCPC
- Corps Orders Canadian Postal Corps
- COCTC
- Canadian Ordnance Corps Training Centre
- COCTUSC
- Canadian Officer Cadet Training Unit Selection Centre
- COCWAC
- Corps Orders, Canadian Women's Army Corps
- COD
- Central Ordnance Depot
- CODCRCOC
- Central Ordnance Depot Company, Royal Canadian Ordnance Corps
- CODRCOC
- Camp Ordnance Depot, Royal Canadian Ordnance Corps
- COEMETC
- Canadian Ordnance Electrical Mechanical Engineer Training Course
- COF
- Canadian Army Occupation Force
- COF
- Canadian Occupational Force
- CofAS
- Corps of Army Schoolmasters
- CofC
- Queen's Own Cameron Highlanders of Canada
- CofF
- Chaplain of the Fleet
- CofHRS
- Corps of Hussars
- CofI
- Court of Inquiry - group of officers convened to investigate specific questions or events
- CofLondYeo
- County of London Yeomanry
- CofLRS
- Corps of Lancers
- COFPRCOC
- Canadian Ordnance Field Park, Royal Canadian Ordnance Corps
- CofS
- Chief of Staff
- CofS
- Cross of Sacrifice (Memorial Cross)
- CofW
- Cable or Wireless
- COHQ
- Combined Operations Headquarters
- COI
- Court of Inquiry
- Col
- Colonel
- Coln
- Column
- Com
- Command - unit under the command of one officer or non-commissioned officer
- COM
- Commissioner
- Com10thFleetCandR
- Commander 10th Fleet Convoy and Routeing (US)
- ComBtswn
- Commissioned Boatswain
- COMC&S
- Canadian Ordnance Maintenance Company & Sections
- Comd
- Command - unit under the command of one officer or non-commissioned officer
- Comd
- Commandant
- Comd
- Commander
- Comd
- Commanding
- Com'd
- Command - unit under the command of one officer or non-commissioned officer
- ComdEngr
- Command Engineer
- COMDGEN
- Commanding General (U.S.)
- Comdt
- Commandant
- COME
- Chief Ordnance Mechanical Engineer
- COMERU
- Canadian Ordnance and Mechanical Engineer Reinforcement Unit
- COMINCH
- Commander in Chief, US Fleet
- CominchCandR
- Commander in Chief, US Fleet, Convoy and Routeing
- Comm
- Commission
- Comm
- Commodore
- Commande (D)
- Commander (Destroyers)
- Commodore(D)WA
- Commodore (Destroyers), Western Approaches
- CommofCustoms
- Commissioner of Customs
- Comn
- Communication
- ComOp
- Communications Operator
- ComOpSupr
- Communications Operator Supervisor
- Comp
- Composite
- ComPC(A)
- Communications Performance Checker (Air)
- ComPC(G)
- Communications Performance Checker (Ground)
- ComTech
- Communications Technician
- ComTech(A)
- Communications Technician (Air)
- ComTech(G)
- Communications Technician (Ground)
- Conc
- Concentrate
- Conc
- Concentration
- Cond
- Conductor
- COND
- Commanding Officer Naval Divisions
- Condr
- Conductor
- Connav (No)
- Navy Authority, Washington
- ConnRang
- Connaught Rangers
- Const
- Constable
- Constl
- Constructional
- constr
- Construction
- ConstrC
- Constructor Captain
- Conv
- Convalescent - a soldier recovering from wounds or illness
- ConvoyCYeoSigs
- Convoy Chief Yeoman of Signals
- ConvoyLSig
- Convoy Leading Signalman
- ConvoyOSig
- Convoy Ordinary Signalman
- ConvoySig
- Convoy Signalman
- ConvoyYeoSigs
- Convoy Yeoman of Signals
- Cook(O)
- Cook (Officer's)
- Cook(S)
- Cook (Ship's)
- COOS(M)RCOC
- Canadian Ordnance Officer's Shop (Mobile), Royal Canadian Ordnance Corps
- COP
- Commander of Port
- COPC
- Commanding Officer Pacific Coast
- COPD
- Canadian Overseas Postal Depot
- COpSO
- Chief Operational Services Officer
- Cor
- Corvettes
- COR
- Confirmation of Rank
- CORC
- Canadian Ordnance Railhead Company
- CORCAMC
- Corps Orders, Royal Canadian Army Medical Corps
- CORCC
- Canadian Overseas Railway Construction Corps
- CORCRCOC
- Canadian Ordnance Railhead Company, Royal Canadian Ordnance Company
- CORCT
- Canadian Overseas Railway Construction Troops
- CORD
- Central Ontario Regimental Depot - facility in England used to assemble men and to store and administer equipment and materials
- CORD
- Commanding Officer Reserve Divisions
- Corp
- Corporal
- Corpl
- Corporal
- CORU
- Canadian Ordnance Reinforcement Unit
- Cos
- Companies
- CoS
- Chief(s) of Staff
- COS
- Change of Strength
- COS
- Coming Off Strength
- COS
- Company Orderly Sergeant
- COS&CB
- Canadian Officers Survey & Classification Board
- COSAI
- Canadian Ordnance Stores Accounting Inspectorate
- COSSAC
- Chief of Staff to the Supreme Allied Commander (Designate)
- COTC
- Canadian Officer Training Centre
- COTC
- Canadian Officer Training Corps
- COTC
- Canadian Overseas Telecommunication Corporation
- COU
- Called Out Under
- COVGofC
- Corps Orders Veterans Guard of Canada
- Cox'n
- Coxswain
- Coy
- Company - unit of approximately 200 men, divided into 4 platoons
- CP
- Chaplains Pool
- CP
- Command Post
- CPACRCAMC
- Canadian Prophylactic Ablution Centre, Royal Canadian Army Medical Corps
- CPB
- Canadian Parachute Battalion
- CPB
- Canadian Pioneer Battalion
- CPBRCE
- Canadian Pioneer Battalion, Royal Canadian Engineers
- CPC
- Canadian Pension Commission (Department of Veterans Affairs)
- CPC
- Canadian Postal Corps
- CPC
- Canadian Provost Corps
- CPC
- Corps Protection Company
- CPCCMF(ADHOC)
- Canadian Pioneer Company, Central Mediterranean Force
- CPCD
- Canadian Provost Corps Depot
- CPCO/S(PU)
- Canadian Postal Corps Overseas, (Postal Units)
- CPCURCASC
- Canadian Port Clearance Unit, Royal Canadian Army Service Corps
- CPDPRCE
- Canadian Pile Driving Platoon, Royal Canadian Engineers
- CPDRCAPC
- Command Pay Detachment, Royal Canadian Army Pay Corps
- CPF
- Canadian Patriotic Front
- CPI
- Corps of Permanent Instructors
- CPinME
- Canadian Personnel in Middle East
- Cpl
- Corporal
- CPLAM
- Corporal Ambulance
- CPMH
- Camp Petawawa Military Hospital
- CPMHRCAMC
- Chorley Park Military Hospital, Royal Canadian Army Medical Corps
- CPMMLRCOC
- Canadian Pilot Model Mobile Laundry, Royal Canadian Ordnance Corps
- CPO
- Chief Petty Officer
- CPO
- Civilian Personnel Officer
- CPR
- Canadian Pacific Railway
- CPRD
- Canadian Public Relations Detachment
- CProC
- Canadian Provost Corps
- CPRS
- Canadian Public Relations Services
- CPRU
- Canadian Public Relations Unit
- CPS
- Canadian Planning Staff
- CPS
- Canadian Publishing Section
- Cpt
- Captain
- CPTC
- Canadian Parachute Training Centre
- CPTCAC
- Canadian Pioneer Troop, Canadian Armoured Corps
- CPTHO
- Captain of Hospital Orderlies
- CPTRE
- Captain Royal Engineers
- CPTU
- Canadian Parachute Training Unit
- CPTUCPC
- Canadian Postal Tracing Unit, Canadian Postal Corps
- CPW/S(ADHOC)RCEME
- Canadian Port Workshop (Ad Hoc), Royal Canadian Electrical and Mechanical Engineers
- CPW/S(ADHOC)RCOC
- Canadian Port Workshop (Ad Hoc), Royal Canadian Ordnance Corps
- CPWEU
- Canadian Petroleum Warfare Experimental Unit
- CQMS
- Company Quartermaster-Sergeant
- Cr
- Commander
- CR
- Régiment de la Chaudière (French only)
- CR
- Central Registry
- CR
- Confirmation of Rank
- CR
- Control Rate
- CR
- Control Rating
- CR
- Control Ratings
- CR(C)E
- Commander, Royal (Canadian) Engineers
- CR(T)
- Calgary Unit (Tank)
- CR/AC
- Canadian Re-allocation Centre
- CRA
- Commander, Royal Artillery
- CRA
- Commanding Royal Artillery
- CRA
- Compulsory Retirement Age
- CRASC
- Commander, Royal Army Service Corps
- CRB
- Canadian Rifle Battalion
- CRB
- Career Review Board
- CRB(M)
- Career Review Board (Medical)
- CRBRCA
- Canadian Rocket Battery, Royal Canadian Artillery
- CRBW/SRCEME
- Canadian Radar Battery Workshop, Royal Canadian Electrical and Mechanical Engineers
- CRC
- Canadian Reception Camp
- CRC
- Casualty Retraining Centre
- CRC
- Chief Registration Clerk
- CRCAMC
- Company Royal Canadian Army Medical Corps
- CRCASCATBC
- Company Royal Canadian Army Service Army Tank Brigade Company
- CRCASCATBC
- Company Royal Canadian Army Service Corps
- CRCC
- Canadian Railway Construction Corps
- CRCC
- Canadian Road Construction Company
- CRCE
- Company Royal Canadian Engineers
- CRCE(PB)
- Commander Royal Canadian Engineers (Permanent Bridges)
- CRCE(W)
- Commander Royal Canadian Engineers (Works)
- CRCEME
- Company Royal Canadian Electrical and Mechanical Engineers
- CRCL
- Canadian Red Cross List
- CRCORU
- Canadian Royal Canadian Ordnance Corps Reinforcement Unit
- CRCR
- Canadian Reserve Calvary Regiment - cavalry reserve unit based in England
- CRCRCAMC
- Casualty Retraining Centre, Royal Canadian Army Medical Corps
- CRCRCEME
- Canadian Recovery Company, Royal Canadian Electrical and Mechanical Engineers
- CRCRCOC
- Canadian Recovery Company, Royal Canadian Ordnance Corps
- CRD
- Canadian Reception Depot
- CRD
- Canadian Remount Depot
- CRD(LS)
- Canadian Repatriation Depot (LS)
- CRDFT(S)C
- Canadian Radio Detection Finder Training (School) Centre
- CRDFTC
- Canadian Radio Direction Finder Training Centre
- CRE
- Commander Royal Engineers
- CRecs
- Controller of Records (Air)
- CREME
- Commander Royal Electrical and Mechanical Engineers
- CRFTTC
- Canadian Reinforcement Transit Camp
- CRGTPRCASC
- Canadian Reinforcement Group Transit Platoon, Royal Canadian Army Service Corps
- CRGWP
- Canadian Reinforcement Group Workshop Platoon
- CRI
- Chinese Regiment of Infantry
- CRLE
- Canadian Radio Location Establishment
- Crmn
- Crewman
- CRN
- Change Regimental Number
- CRO
- Canadian Records Office
- CRO
- Chief Recruiting Officer
- CRO
- Corps Reserve of Officers
- CRO
- Officer in Charge Central Registry
- CROCRCE
- Canadian Railway Operation Company, Royal Canadian Engineers
- Crpl
- Corporal
- CRR(PLDG)
- Canadian Reconnaissance Regiment (Princess Louise Dragoon Guards)
- CRRCA
- Coast regiment, Royal Canadian Artillery
- CRS
- Canadian Recce Squadron
- CRS
- Captured Records Section (US Dept of the Army)
- CRS
- Central Recruiting Troop
- CRS-CIB
- Canadian Recce Squadron-Canadian Infantry Brigade
- CrStGeo
- Cross of Saint George (Russia)
- CRT
- Canadian Railway Troops - men recruited and organized to operate railways in rear areas
- CRT
- Continuous Reserve Training
- CRTC
- Canadian Radar Training Centre
- CRTC(A)
- Canadian Reconnaissance Training Centre (Active)
- CRTC(R)
- Canadian Reconnaissance Training Centre (Reserve)
- CRU
- Canadian Reinforcement Unit
- CRUPU
- Canadian Reinforcement Units Postal Units
- CRURCA
- Canadian Rocket Unit, Royal Canadian Artillery
- Crypto
- Cryptographer
- CS
- Cease
- CS
- Christian Science (Church)
- CS
- Commandant Staff
- CS
- Communicator (Ship's)
- CS
- Communicator (Supplementary)
- CS
- Cypher Section
- CS&AC
- Canadian Selection & Appraisal Centre
- CS&TO
- Camp Supply & Transport Officer
- CS(No)
- Admiralty File Number
- CSA
- Canadian Small Arms
- CSA
- Consular Shipping Adviser
- CSAFVIRCEME
- Canadian Section Armoured Fighting Vehicles Inspectorate, Royal Canadian Electrical and Mechanical Engineers
- CSAFVTS
- Canadian Section Armoured Fighting Vehicles Technical Staff
- CSAI
- Canadian School of Army Instruction
- CSAS(E)
- Canadian Small Arms School (Eastern)
- CSAS(WC)
- Canadian Small Arms School (Western Canada)
- CSATC
- Canadian Small Arms Training Centre
- CSB
- Canadian Shipping Board
- CSBASRAC
- Canadian Special BASRA Company
- CSBD
- Canadian Special Base Depot
- CSC
- Cadet Services of Canada
- CSC
- Canadian Service College
- CSC
- Chiefs of Staff Committee
- CSC
- Commissariat Staff Corps
- CSC
- Corporal Signal Corps
- CSCC
- Canadian Section Claims Commission
- CScotR
- Canadian Scottish Regiment
- CSCRCOC
- Canadian Salvage Corps, Royal Canadian Ordnance Corps
- CSDS
- Canadian Special Driving School
- CSE
- Colour Sergeant
- CSEAFHQ
- Canadian Section Echelon Allied Forces, Headquarters
- CSEC
- Canadian Special Employment Company
- CSEE
- Canadian Signals Experimental Establishment
- CSEF
- Canadian Siberian Expeditionary Force
- CSG
- Clerk Stenographer Group
- CSGHQ2ndEch
- Canadian Section General Headquarters, 2nd Echelon
- CSGHQE
- Canadian Section General Headquarters Echelon
- CSgt
- Colour Sergeant
- CSHQBGNR
- Canadian Section Headquarters, Brussels, GRN
- CSHQCC
- Cypher Section Headquarters Canadian Corps
- CSI
- Companion of the Star of India
- CSIB
- Canadian Special Infantry Battalion
- CSIC
- Canadian Special Infantry Company
- CSICoy
- Canadian Special Infantry Company
- CSIS
- Canadian Security and Intelligence Service
- CSKSU
- Canadian Surplus Kit Storage Unit
- CSM
- Company Sergeant-Major - senior non-commissioned officer in a company
- CSME
- Canadian School of Military Engineering
- CSMH
- Christie Street Military Hospital
- CSO
- Chief Signal Officer
- CSofA
- Canadian School of Artillery
- CSofAA
- Canadian School of Army Administration
- CSofI
- Canadian School of Infantry
- CSOI
- Commandant School of Instruction
- CSOR
- Chief Staff Officer Reserves
- Csr
- Cruiser
- CSR&DE
- Canadian Signals Research & Development Establishment
- CSR(MG)
- Canadian Scottish Regiment (Machine Gun)
- CSRCCS
- Construction Section, Royal Canadian Corps of Signals
- CSRU
- Canadian Signals Reinforcement Unit
- CSSB
- Canadian Special Service Battalion
- CSSCRCOC
- Canadian Special Stores Company, Royal Canadian Ordnance Corps
- CSSD
- Canadian Special Salvage Detachment
- CSTC
- Canadian Signal Training Centre
- CSTech
- Communications Systems Technician
- CSTTB
- Canadian Standing Trades Test Board
- CSTV
- Coil Skids Towing Vessel
- CSupt
- Commodore Superintendant
- CSURCEME
- Canadian Servicing Unit, Royal Canadian Electrical and Mechanical Engineers
- CSURCOC
- Canadian Salvage Units, Royal Canadian Ordnance Corps
- CSV
- Camp Staff Volunteer
- CSWSTRCCS
- Canadian Shock Wave Section Type, Royal Canadian Signals Corps
- CSWTS
- Canadian Section Weapons Technical Staff
- CT
- Communication Trench
- CT
- Component Transfer
- CT(CFC)TC
- Camp Tremblay (Canadian Forestry Corps) Training Centre
- CTA
- Canadian Troop Aldershot
- CTACRCASC
- Corps Troop Ammunition Company, Royal Canadian Army Service Corps
- CTC
- Canadian Tank Corps
- CTC
- Canadian Transit Camp
- CTC
- Canadian Troops Colchester
- CTC(TB)CPC
- Canadian Tobacco Depot (Type B), CPC (see above for various meanings of CPC)
- CTCRCE
- Canadian Tunnelling Company, Royal Canadian Engineers
- CTCSPCProC
- Canadian Traffic Control Section Provost, Canadian Provost Corps
- CTCURCACMF
- Canadian Traffic Control Unit, Royal Canadian Artillery, Central Mediterranean Force
- CTCW
- Canadian Transit Camp Wing
- CTD
- Canadian Training Division
- CTDCPC
- Canadian Tobacco Depot, CPC (see above for various meanings of CPC)
- CTDS(ER)
- Canadian Tank Delivery Squadron (Elgin Regiment)
- CTDSSD
- Canadian Tank Delivery Squadron Signals Detachment
- CTDUCAC
- Canadian Tank Demonstration Unit, Canadian Armoured Corps
- CTF
- Commander Task Force
- CTFARCAMC
- Canadian Training Field Ambulance, Royal Canadian Army Medical Corps
- CTH
- Canadian Troops Hereford
- CTLC
- Canadian Technical Liaison Group
- CTMU
- Canadian Town Major Unit
- CtnAsst
- Canteen Assistant
- CtnMngr
- Canteen Manager
- CTO
- Central Telegraph Office
- CTO
- Chief Treasury Officer
- CTO(N)
- Chief Treasury Officer (Navy)
- CTOO/S
- Canadian Treasury Office Overseas
- CTP
- Canadian Transport Platoon
- CTP
- Course Training Plan
- CTPCRCASC
- Corps Troops Petrol Company, Royal Canadian Army Service Corps
- CTPRCASC
- Canadian Tipper Platoon, Royal Canadian Army Service Corps
- CTPRCASC
- Canadian Transport Platoon, Royal Canadian Army Service Corps
- CTps
- Corps Troops
- CTRCA
- Calibration Troop, Royal Canadian Artillery
- CtRep
- Court Reporter
- CTS
- Canadian Training School
- CTS
- Clothe the Soldier
- CTS
- Composite Training School
- CTS
- Conversion Training Squadron
- CTSC
- Corps Troops Supply Column
- CTSCRCASC
- Corps Troop Supply Column, Royal Canadian Army Service Corps
- CTTC
- Canadian Tank Transport Company
- cttee
- Committee
- CTTW/SRCEME
- Canadian Tank Troops Workshop, Royal Canadian Electrical and Mechanical Engineers
- CTTW/SRCOC
- Canadian Tank Troops Workshop, Royal Canadian Ordnance Corps
- CTU
- Commander Task Unit (U.S.)
- CU
- Camp Utopia
- CU
- Caribbean-United Kingdom Convoy
- CU
- Conducting Unit
- CU
- Conversion Unit
- CUNEF
- Canadian Component United Nations Emergency Force (Middle East)
- CUS
- Course (U.S.)
- CUT
- Cutter (U.S.)
- CV
- Aircraft Carrier (U.S.)
- CV
- Communicator (V)
- CV
- Cross of Valour
- CVA&CG
- Canadian Vehicle Assembly & Control Group
- CVD
- Commercial Vessel Defensive
- CVDtURCAMC
- Canadian Venereal Disease Treatment Unit, Royal Canadian Army Medical Corps
- CVE
- Auxiliary Aircraft Carrier (U.S.)
- CVE
- Carrier Vessel Escort
- CVHGCASF
- Company Veterans Home Guard, Canadian Active Service Force
- CVIRCEME
- Canadian Vehicle Inspectorate, Royal Canadian Electrical and Mechanical Engineers
- CVO
- Commander of the Royal Victorian Order
- CVO
- Royal Victorian Order (Commander)
- CVP
- Convoy Programme
- CVSM
- Canadian Volunteer Service Medal
- CVWS
- Canadian Vehicle Waterproofing School
- CW
- Chemical Warfare
- CW
- Commissioned Warrant
- CW
- Communicator (W)
- CW(No)
- Admiralty Record Office File
- CW/S&PC
- Canadian Workshop and Park Company
- CWAAF
- Canadian Women's Auxiliary Air Force
- CWAC
- Canadian Women's Army Corps
- CWACBTC
- Canadian Women's Army Corps, Basic Training Centre
- CWACCS
- Canadian Women's Army Corps, Composite Stores
- CWACDO
- Canadian Women's Army Corps, District Orders
- CWACMB
- Canadian Women's Army Corps, Military Band
- CWACO
- Canadian Women's Army Corps, Ottawa
- CWACPB
- Canadian Women's Army Corps, Pipe Band
- CWACTC
- Canadian Women's Army Corps, Training Centre
- CWB
- Canadian Wives Bureau
- CWC
- Chemical Warfare Course
- CWDL
- Chemical Warfare Defence Laboratory
- CWGC
- Commonwealth War Graves Commission
- CWL
- Chemical Warfare Laboratories
- CWM
- Canadian War Museum
- CWNS
- Canadian War Narrative Section
- CWRO
- Canadian War Records Office
- CWS(IC)
- Canadian Wireless Section (Intelligence Corps)
- CWSF
- Commander Western Sea Frontier
- CWSRCE
- Canadian Works Section, Royal Canadian Engineers
- CWTC
- Chemical Warfare Training Centre
- CWTD
- Cold Weather Test Trail Detachment
- CWTV
- Calibration Wireless Telegraph Vessel
- CXO
- Chief Examination Officer
- Cy
- Company
- Cyc
- Cyclist
- CYS
- Chief Yeoman of Signals
- CZ
- Canal Zone (Panama) (U.S.)
- CZ
- Clyde Division - Royal Naval Volunteer Reserve
- CZT
- Civil Zone Time
Military abbreviations used in service files starting with D
- D
- Destroyer
- D
- Deffered
- D
- Dragoon Guards and Dragoons Regimental Number Prefix
- D(iv)HQ
- Divisional Headquarters
- D/C
- Depth Charge
- D/DEMS
- Director of Defensively Equipped Merchant Ships
- D/DSR
- Deputy Director of Scientific Research
- D/DWT
- Deputy Director of Warfare and Training
- D/F
- Direction Finding / Finder
- D/G
- Degaussing
- D/JAP
- Deputy Judge Advocate of the Fleet
- D/WRCNS
- Director of Women's Royal Canadian Naval Service
- d/wt
- Dead-weight
- D:CTRCASC
- Drivers: Corps Troops, Royal Canadian Army Service Corps
- DA
- Distributing Authority
- DA
- Dominion Arsenal
- DA
- Director of Accounts (Air)
- DA
- Disturbance Allowance
- DA&PC
- Division Ammunition & Petrol Company
- DA&QMG
- Deputy Adjutant and Quartermaster General
- DA/S
- Director of Anti-submarine
- DAAG
- Deputy Assistant Adjutant-General
- DAAG(Sigs)
- Deputy Assistant Adjutant General (Signals)
- DAANDQMG
- Deputy Adjutant and Quartermaster General
- DAAP
- Dependent's Allowance & Assigned Pay
- DAB
- Dependent's Allowance Board
- DAB12
- Dependent's Allowance Board Claimant's Statement
- DAB28
- Dependent's Allowance Board (Medical Examiner's Report) Statutory Declaration
- DAC
- Divisional Ammunition Column - organization responsible for supplying ammunition to a division
- DAC
- Divisional Ammunition Company - organization responsible for supplying ammunition to a division
- DACRCAMC
- Division Ammunition Company, Royal Canadian Army Medical Corps
- DAD(Svy)
- Deputy Assistant Director of Surveys
- DAD(Tn)
- Deputy Assistant Director of Transportation
- DADAPS
- Deputy Assistant Director Army Postal Services
- DADCS
- Deputy Assistant Director of Chaplain Services
- DADES
- Deputy Assistant Director of Engineer Services
- DADMS
- Deputy Assistant Director of Medical Services
- DADOS
- Deputy Assistant Director of Ordnances Services
- DADR
- Deputy Assistant Director of Roads
- DADST
- Deputy Assistant Director Supply & Transport
- DADVS
- Deputy Assistant Director of Veterinary Services
- DAE
- Director of Aeronautical Engineering
- DAEF
- Distributing Authority, Eastern Fleet
- DAEM
- Distributing Authority, Eastern Mediterranean
- DAFM
- Director of Air Force Manning
- DAFR
- Director of Air Force Recruiting
- DAG
- Deputy Adjutant General
- DAG(M)
- Deputy Adjutant General (National Resources Mobilization Act of 1940)
- DAGB
- Defended Area Goose Bay
- DAI
- Director of Aeronautical Inspection
- DAL&KINGC
- Dalhousie & King Contingent
- DAO
- District Audit Office
- DAO
- Director of Air Organization
- DAO
- Dental Associate
- DAOD
- Defence Administrative Orders and Directives
- DAP
- Director of Air Personnel
- DAP
- Divisional Aid Post
- DAP(P2)
- P.2 Branch, Director of Air Personnel (Civilian Personnel Administration)
- DAPA
- Director of Air Personnel Administration
- DAPS
- Director of Airmen Personnel Services
- DAQMG
- Deputy Assistant Quartermaster General
- DAR
- Designation of Acting Ranks
- DAS
- Director of Air Signals
- DASD
- Director of Air Staff Duties
- DASO
- Deputy Armament Supply Officer
- DASRS
- Director of Air Sea Rescue Services
- DAT
- Director of Air Training
- DataP
- Data Processor
- DB
- Discharge Badge (For Services Rendered)
- DBS
- Distressed British Seaman
- DBURCASC
- Division Bath Unit, Royal Canadian Army Service Corps
- DC
- Duty Captain
- DC
- Director of Contracts
- DCAS
- Deputy Chief of the Air staff
- DCAS
- Detachment Canadian Auxiliary Section
- DCASEU(AS)
- Detachment Canadian Auxiliary Section Entertainment Unit (Army Show)
- DCC
- District Cadet Camp
- DCCMSC
- Detachment Corps, Corps of Military Staff Clerks
- DCCO
- Deputy Chief of Combined Operations
- DCCR
- Depot Canadian Cavalry Regiment
- DCCRCAMC
- Division Composite Company, Royal Canadian Army Medical Corps
- DCCWAC
- Depot Company, Canadian Women's Army Corps
- DCCWAC(CSW)
- Depot Company, Canadian Women's Army Corps (Composite Stores Wing)
- DCDRCASC
- Debert Camp Detachment, Royal Canadian Army Service Corps
- DCDS
- Deputy Chief of the Defence Staff
- DCE(PB)
- Deputy Chief Engineer (Permanent Bridges)
- DCE(Wks)(Adm)(Rear)
- Deputy Chief Engineer (Works) (Administration) (Rear)
- DCFC
- Detachment Canadian Forestry Corps
- DCGS
- Deputy Chief of the General Staff
- DCIA
- Deputy Chief Inspector of Armament
- DCLI
- Duke of Cornwall's Light Infantry
- DCM
- District Court Martial
- DCM
- Distinguished Conduct Medal - medal for bravery awarded to other ranks (non-officers)
- DCMC
- District Course Methods of Coaching
- DCNS
- Deputy Chief of the Naval Staff
- DCO
- Deputy Commanding Officer
- DCO
- District Cadet Orders
- DCOR
- Duke of Connaught's Own Rifles (28th Armoured Regiment)
- DCOS
- Deputy Chief of Staff
- DCP
- Director of Civilian Personnel
- DCRCASC
- District Company, Royal Canadian Army Service Corps
- DCRCH
- 6th Duke of Connaught's Royal Canadian Hussars
- DCRE
- Deputy Commander, Royal Engineers
- DCS
- Director of Chaplain Services
- DCS
- Damage Control School
- DCS
- District Chaplain Services
- DCS
- Daily Casualty Summary
- DCSO
- District Camp School Orders
- DCT
- Director Combined Training
- DCTS
- District Course Training Staff
- DCVM
- District Course Vehicle Maintenance
- DCW&S
- Director Chemical Warfare & Smoke
- DD
- District Depot
- DD
- Deputy Director
- DD
- Destroyer Division (U.S.)
- DD
- Discharge Dead
- DD
- Duty Discipline
- DD(A)WD
- District Depot (Active) Windsor Detachment
- DD(NRMA)
- District Depot (National Resources Mobilization Act of 1940)
- DD(Svy)
- Deputy Director of Surveys
- DD(tanks)
- Duplex-Drive (amphibious)
- DDAD
- Deputy Director of Aircraft Development
- DDArmD
- Deputy Director of Armament Development (Air)
- DDC
- Division Dental Company
- DDCDC
- Dental Detachment Canadian Dental Corps
- DDED
- Deputy Director of Engine Development (Air)
- DDEM
- Director(ate) of Design, Equipment and Mechanization
- DDES
- Deputy Director of Engineer Services
- DDH
- Destroyer, Helicopter Carrying
- DDHS
- Deputy Director Historical Section
- DDMO(O)
- Deputy Director of Military Operations (Overseas)
- DDMP
- Deputy Director of Maintenance Plans
- DDMS
- Deputy Director of Medical Services
- DDPD
- District Depot Provost Detachment
- DDRD
- Deputy Director of Radio Development (Air)
- DDS
- Director Dental Services
- DDSM
- Deputy Director of Service Maintenance (Air)
- DDSP
- Deputy Director of Supply Planning (Air)
- DDSS
- Deputy Director of Supply Services (Air)
- DDTCO
- Deputy Director Training Combined Operations
- DDVET
- Deputy Director of Victualling, Eastern Theatre
- DDWB
- District Depot Wolseley Barracks
- DE
- Deckhand
- DE
- Convoy Escort Vessel
- DE
- Destroyer Escort Vessel (U.S.)
- DE&CD
- Director Electrical & Communication Designs
- DEAL
- Deal Division, Royal Marines
- Dec
- Decoration
- DED
- Director(ate) of Engineer Development
- DEE
- Director of Electrical Engineering
- Def
- Defence
- Defensor
- National Defence Headquarters (Address used in telegrams)
- DEMS
- Defensively Equipped Merchant Ships
- DEMTech
- Dental Equipment Maintenance Technician
- DenbighYeo
- Denbigh Yeomanry
- DEngrs
- Director(ate) of Engineers
- DENT
- Dental
- DentA
- Dental Assistant
- DentA
- Dental Association
- DentClA
- Dental Clinic Assistant
- Dents
- Director Dental Services
- Dents(Air)
- Staff Officer Dental Services (Air)
- DentThr
- Dental Therapist
- DEO
- District Engineer Officer
- DEO
- Direct Entry Officer
- DEOVR
- Duke of Edinburgh's Own Volunteer Rifles
- Dep
- Depot
- DEP
- Director Engineering and Personnel
- Dept
- Department
- DERCA
- District Establishment, Royal Canadian Artillery
- DERCAHAD
- District Establishment, Royal Canadian Artillery, Halifax Armament District
- Des
- Destroyers
- DES
- Director of Engineer Services
- DES
- Drummer Sergeant
- DESOIL
- Diesel Oil (U.S.)
- Desp
- Mentioned in Despatches
- Despatches
- Mentioned in Despatches
- Det
- Detachment
- Detn
- Detention
- Det'n
- Detention
- DEU
- Distinctive Environmental Uniform
- DevonR
- Devonshire Regiment
- DF
- Destroyer Flotilla
- DF
- Direction Finding
- DFASS
- Director of Fleet Accounting, Supply and Secretariat
- DFC
- Distinguished Flying Cross
- DFD
- Detailed for Duty
- DFM
- Distinguished Flying Medal
- DFMS
- Defensively Equipped Merchant Ships
- DG
- Degaussing
- DG
- Director General
- DG
- Degaussing Gear
- DG
- Delivery Group
- DG
- Dragoon Guards
- DGAD
- Director General Arsenals Division
- DGC&AA
- Director General Coast and Anti-Aircraft Defences
- DGDS
- Director General Dental Services
- DGES
- Director General of Engineer Services
- DGHS
- Director General Health Services
- DGISD
- Director-General India Stores Department
- DGMC
- Director General Military Careers
- DGMS
- Director General of Medical Services
- Dgns
- Dragoons
- DGO
- Degaussing Officer (Naval)
- DgofMS
- Director General of Medical Services
- DGPA
- Director General Personnel Administration
- DGPA
- Director General (Public Affairs)
- DGPandI
- Director-General of Ports and Lights
- DGPCO
- Director General Postings and Careers Officers
- DGPCOR
- Director General Postings and Careers Other Ranks
- DGRC
- Director General (Reserves and Cadets)
- DGSP
- Director General Strategic Planning
- DGSR
- Director-General of Shipbuilding and Repairs
- DH
- Depot Hussars
- DH
- Deck Hand
- DH(No)
- His/Her Majesty's Canadian Ship " Scotian", Base Files
- DHD
- Director of Harbour Defence
- DHD
- Deck Hand
- DHGMR
- Drill Hall Guarding Maisonneuve Regiment
- DHH
- Directorate of History and Heritage
- DHist
- Director Historical Section
- DHMD
- District Headquarters Manning Depot OR Military District
- DHQCFC
- District Headquarters Canadian Forestry Corps
- DHQS
- District Headquarters Staff
- DHQSS
- District Headquarters Subordinate Staff
- DHS
- Director of Historical Section
- DI
- Daily Inspection (Vehicle)
- DI
- Drill Instructor
- DIB
- "D" Infantry Battalion
- DID
- Detail Issue Depot (Royal Canadian Army Service Corps)
- DiedofW
- Died of Wounds
- Diem
- Day
- Diet
- Dietician
- DIList
- Dangerously Ill List
- DIN
- Defence Information Network
- DIO
- Director of Internment Operations
- DIPC
- Director International Plans Coordination
- Dir
- Director
- DirGen
- Director General
- DIRMITRAIN
- Director of Military Training
- DIRU
- Division Infantry Reinforcement Unit
- dis
- Discharged - released from the military service, or from a hospital
- DIS
- Division Intelligence Section
- disch
- Discharged
- Discip
- Disciplinarian
- Disemb
- Disembarked
- DISO
- Defence Information Services Organization
- Dist
- District
- DistEngrs
- District Engineers
- Distr
- District
- DIT
- Director Individual Training
- Div
- Divisional Ammunition Column
- Div
- Division or Divisional - unit of approximately 12,000 men commanded by a major-general
- Div
- Divisional
- Div(nl)
- Division(al)
- DivBrPl(Tp)
- Divisional Bridge Platoon (Troop)
- DivSig
- Divisional Signal(s) (Company)
- DivStr
- Divisional Strength
- DJAG
- Deputy Judge Advocate General
- DlabTech
- Dental Laboratory Technician
- DLADRCOC
- Division Light Aid Detachment, Royal Canadian Ordnance Corps
- DLCO
- Deck Landing Control Officer
- DLI
- Durham Light Infantry
- DLOY
- Duke of Lancaster's Own Yeomanry
- DLP
- Director of Electrical Personnel
- DLS
- Dominion Land Surveyor
- DM
- Driver of Mechanized Transport
- DM
- Defence Medal
- DM
- Light Mine Layer (High Speed) (U.S.)
- DM
- Deputy Minister
- DM&A
- Director(ate) of Mechanization and Artillery
- DM(A)
- Deputy Minister (Air)
- DM(N)
- Deputy Minister (Naval)
- DMech
- Driver Mechanic
- DMGO
- Deputy Master General of Ordnance
- DMH
- Dartmouth Military Hospital
- DMHRCAMC
- Debert Military Hospital, Royal Canadian Army Medical Corps
- DMHRCAMC
- Dundurn Military Hospital, Royal Canadian Army Medical Corps
- DMI
- Director Military Intelligence
- Dmin
- Deputy Minister
- Dmn
- Draughtsman
- DMNA
- Director Manning and Naval Assistant
- DmnAE
- Draughtsman Aeronautical Engineering
- DmnCE
- Draughtsman Construction Engineering
- DmnGA
- Draughtsman Graphic Arts
- DMO
- Director(ate) of Military Operations
- DMO&I
- Director(ate) of Military Operations and Intelligence
- DMO&P
- Director(ate) of Military Operations and Planning
- Dmr
- Drummer
- DMRD
- Director of Medical Research and Development
- DMS
- Director of Merchant Seaman
- DMS
- Director of Medical Services
- DMS
- Mine Sweeper (High Speed) (U.S.)
- DMS
- Driver Mechanics School
- DMS
- Department of Munitions and Supply
- DMS
- Driver Maintenance Staff
- DMS(Air)
- Director of Medical Services (Air)
- DMT
- Director(ate) of Military Training
- DMT
- District Mounted Troops
- DMT&SD
- Directorate of Military Training and Staff Duties
- DNA
- Director of Naval Accounts
- DNA
- Director of Naval Appropriations
- DNC
- Director Naval Construction
- DNC
- Director of Naval Communications (U.S.)
- DNCSEAC
- Deputy Naval Commander South East Asia Command
- DNCXF
- Deputy Naval Commander Expeditionary Force
- DND
- Department of National Defence
- DNE
- Director Naval Education
- DNES
- Director of Naval Engineering Service
- DNHS
- Director of the Naval Historical Section
- DNI
- Director of Naval Intelligence
- DNI
- Director Naval Information
- DNI
- Director of Naval Intelligence & Trade
- DNI and P
- Director of Naval Intelligence and Plans
- DNK
- Date Not Known
- DnkyMn
- Donkeyman
- DNLO
- Dutch Naval Liaison Officer
- DNO
- Director Naval Ordinance
- DNO
- Director of naval Ordnance (Torpedoes Mines)
- DNO
- Destroyer Navigating Officer
- DNOT
- Director of Naval Operations and Training
- DNP
- Director of Naval Personnel
- DNPA
- Director of Naval Pay Accounting
- DNR
- Director of Naval Reserves
- DNS
- Director of Naval Stores
- DNS
- Director of Naval Services
- DNS
- Dragoons
- DNSO
- Deputy Naval Store Officer
- DNT
- Director of Naval Training
- DO
- Dental Officer
- DO
- Duty Officer
- DO
- Daily Order
- DO
- Daily Order (Of a Unit) - administration orders issued to mark personnel changes of a unit (transfers, hospitalizations, etc.)
- DO
- Daily Order (Same as Part II Orders)
- DO
- District Orders
- DOC
- District Officer Commanding
- DOC
- Died of Other Causes
- DOC
- Driver Operation Course
- DOCO
- Drafting Officer Combined Operations
- DOD
- Director Operations Division
- DOD
- Died of Disease
- Dof P
- Director of Plans
- DofCornLI
- Duke of Cornwall Light Infantry
- DofLancsOY
- Duke of Lancashire's Own Yeomanry
- DofP
- Director of Plans
- DOFP
- Divisional Ordnance Field Park, Royal Canadian Ordnance Corps
- DofPR
- Director of Public Relations (Air)
- DofPR
- Director of Public Relations (Army)
- DofT
- Director of Trade
- DofT&M
- Director(ate) of Transport and Movements
- DofUERE
- Director of Underwater Experimental Research Establishment
- DofW
- Died of Wounds - official cause of death
- DofW
- Duration of War
- DOH
- Dominion Orthopaedic Hospital (Toronto)
- DomAff
- Dominion Affairs
- Dominion
- High Commissioner for Canada in the United Kingdom (Address Used in Telegrams)
- DomOrthHosp
- Dominion Orthopaedic Hospital (Toronto)
- DoO&R
- Director of Organization & Recruiting
- DOR
- Director of Operational Research
- DORA
- Defence of the Realm Act
- DOrg
- Director(ate) of Organization
- DOrg
- Director of Organization
- DorsetR
- Dorset Regiment
- DorsetY
- Dorset Yeomanry
- DOS
- Director Ordnance Services
- DOS(A)
- Director of Ordnance Services (Administration)
- DOS(GS)
- Director of Ordnance Services (General Stores)
- DOS(TS)
- Director of Ordnance Services (Technical Stores)
- DOTP
- Dental Officer Training Plan
- DOW
- Duration of war
- DOW
- Died of Wounds
- DP
- Defence Platoon
- DP
- Developmental Period
- DP
- District Paymaster
- DPA
- Director of Procurement (Aircraft)
- DPB
- Defence Purchasing Board
- DPCRCASC
- Division Petrol Company, Royal Canadian Army Service Corps
- DPCRCASC
- Depot Pacific Command, Royal Canadian Army Service Corps
- DPD
- Director of Plans Division
- DPE
- Director of Procurement (Equipment) (Air)
- DPED
- Director Professional Education and Development
- DPersServ
- Director(ate) of Personal Services
- DPGRCOC
- Detachment Proving Grounds, Royal Canadian Ordnance Corps
- DPI
- District Pay Instruction
- DPM
- Deputy Provost Marshal
- DPO
- Director of Plans and Operations (Air)
- DPofG
- Defended Port of Gaspe
- DPofS
- Defended Port of Shelburne
- DPR
- Director of Postings and Records (Air)
- DPR
- Director of Personnel Records
- DPS
- Director of Personnel Selection
- DPSE
- District Paymaster Sergeant
- DPTE
- Drummer Private
- DPW
- Director, Prisoners of War in Canada
- D-QLine
- Drocourt-Quéant Line
- DQMG
- Deputy Quartermaster General
- DQS
- Director(ate) of Quartermaster General Services
- Dr
- Driver
- DR
- Director Records
- DR
- Despatch Rider or motor cyclist
- DR
- Dead Reckoning (U.S.)
- DR
- Officer In Charge Records
- DR
- Dresser
- DR(WD)
- Director of Records (War Diaries)
- DRAE
- Director of Royal Aircraft Establishment
- DraftingEO
- Drafting Engineer Officer
- DRB
- Division Recce Battalion
- DRC
- District Rest Camp
- DRC
- District Recruiting Company
- DRD
- District Recruiting Detachment
- DRD
- Director Reserve Divisions
- DRD&MRU
- District Recruiting Detachment & Mobile Recruiting Units
- DREE
- Director of Research and Experimental Establishment
- Dresser
- Dresser of Wounds
- DRET
- Directorate of Recruiting, Education and Training
- DRI
- Driver
- DrillCoy
- Drilling Company
- DRLS
- Despatch Rider Letter Service
- DRO
- District Record Officer
- DRO
- District Routine Orders
- DRO
- Daily Routine Orders
- DRO
- Divisional Routing Order
- DROCAD
- Divisional Routine Orders Canadian Armed Division
- DRPATAA&TS
- Detention Rooms Port Arthur the Armouries Administration & Training Staff
- Drs
- District Recruiting Services
- DRS
- District Recruiting Staff
- DRS
- Divisional Rest Station
- DRS(LC)RCCS
- Despatch Rider Section (Light Car) Royal Canadian Corps of Signals
- DRTD
- District Recruit Training Depot
- DRU
- Drummer
- DRV
- Driver
- DS
- Dutch Ship
- DS
- Dressing Station
- DS"Z"F
- Dental Section "Z" Force
- DS&TO
- District Supply & Transport Officer
- DS(Records)
- Discharge Section (Records)
- DSA
- Director of Supply Administration (Air)
- DSA
- Draw Subsistence Allowance
- DSANF
- Director South African Naval Forces
- DSB
- Director Shipbuilding
- DSC
- District Shipyard Controller
- DSC
- Distinguished Service Cross
- DSC(L)
- Director of Small Craft (Levant)
- DSCACOW/SRCOC
- Divisional Section Canadian Armoured Corps Ordinance Workshop, Royal Canadian Ordnance Corps
- DSCR
- Department of Soldiers Civil Re-establishment
- DSCRCASC
- Division Supply Column, Royal Canadian Army Service Corps
- DSD
- District Sub-Depot
- DSD
- Director Signals Division
- DSD
- Director(ate) of Staff Duties
- DSD
- Desirable Sailing Date
- DSDF
- Director of Seaward Defence Force
- DSG
- Deputy Surgeon General
- DSISCIC
- District Security Intelligence Section, Canadian Intelligence Corps
- DSM
- Distinguished Service Medal
- DSM
- Drill Sergeant Major
- DSMD
- District Staff Military District
- DSO
- Companion of the Distinguished Service Order
- DSO
- District Supply Officer
- DSO
- Duty Signal Officer
- DSO
- District School Orders
- DSO
- Distinguished Service Order
- DSP
- Director of Seaman Personnel
- DSPC
- Divisional Signals Pacific Command
- DSPD
- Deputy Superintendent Pembroke Dock
- DSQ
- Dockyard Sick Quarters
- DSR
- Director of Ship Repairs
- DSRC
- Division Section Reception Camp
- DSRCCS
- District Signals, Royal Canadian Corps of Signals
- DSS
- Director of Special Services
- DSSD
- Director of Supply Staff Duties (Air)
- DSSRCOC
- District Stores Section, Royal Canadian Ordnance Corps
- DST
- Director(ate) of Supply and Transport
- DSTO(X)
- Divisional Sea Transport Officer, Alexandria
- DTC
- Discharge Transit Centre
- DTD
- Director of Trade Division
- DTM
- Director of Technical Maintenance (Air)
- DTNA
- Director Training and Naval Assistant
- DTO
- Director of Technical Division (Naval)
- DTPG
- Draw Trades Pay Group
- DTPR
- Director of Training Plans and Requirements (Air)
- DTR
- Director(ate) of Technical Research
- DTSS
- Dockyard Tower Signal Station
- DTT
- Director of Technical Training (Air)
- DTTC
- Dental Technical Training Centre
- DU
- Discrimination Unit
- DUKW
- Duck wagon (An amphibious six-wheeled vehicle of six-ton capacity)
- DurhLI
- Durham Light Infantry
- DV
- Diver
- DVA
- Department of Veterans Affairs
- DVGofC
- Detachment Veterans Guard of Canada
- Dvr
- Driver - designation or rank of a soldier who drives vehicles
- DvrSigs
- Driver Signals
- DW
- Director of Works
- DWA
- Director(ate) of Works and Accommodation
- DWB
- Director of Works and Building
- DWC
- Director(ate) of Works and Construction
- DWD
- Director of Welding Development
- DWR
- Director of Weapons and Tactics
- DWS
- Director of Women's Service
- DWT
- Director of Warfare and Training
- DWTF
- District Welfare Trust Fund
- DWTO
- District Weapons Training Officer
- DYRCH
- 17th Duke of York's Royal Canadian Hussars
Military abbreviations used in service files starting with E
- E
- East
- E&M (Coy)
- Electrical and Mechanical (Company)
- E&SCID
- Eastern & Southern Commands Infantry Depot
- EA
- Enemy Action
- EA
- Electrical Artificer
- EA
- Enemy Aircraft
- EA
- Air Electrical Technician
- EA
- Electrical Technician (Air)
- EA
- Emergency Aerodromes
- EA(No)
- Distinguishing letters on files of Permanent Joint Board on Defence
- EA,1c(or2c,3c,4c,5c)
- Electrical Artificer, 1st Class (or 2nd, 3rd, 4th or 5th Class)
- EAC
- Eastern Air Command
- EACC
- Enemy Alien Concentration Camp
- EAFC
- Empty Anti-Freeze Containers
- EAM
- Executive Assistant to the Honourable Minister
- EAM/BMO
- Electrical Anti-mining Base Maintenance Officer
- EAMGO
- Executive Assistant to the Master General of Ordnance
- EARS
- Enemy Alien Receiving Station
- EATS
- Equipment Accounting Training School
- EBSRVR
- East Bengal State Railway Volunteer Rifles
- EC
- Eastern Canada
- EC
- Educational Company
- ech
- Echelon
- ECMCourse
- Electronics Countermeasures Course
- ECr
- Engineer Commander
- ED
- Efficiency Decoration
- ED
- Equipment Depot
- ED
- Excused Duties
- ED&T
- Exempt From Drill and Training
- EDC
- Elementary Driving Corps
- EdmFus
- Edmonton Fusiliers
- EDR
- Radar Display Room
- EdServ
- Educational Services
- EDSRCASC
- Echelon Division Supply, Royal Canadian Army Service Corps
- EE
- Electrical Engineer
- EE
- Exercise Eskimo
- EEAD
- Chief Examiner of Armament Design
- EEF
- Egyptian Expeditionary Force
- EERCE
- Experimental Establishment, Royal Canadian Engineers
- EES
- Eastern Examination Service
- EF
- Eastern Fleet
- EF
- Edmonton Fusiliers
- EFC
- Expeditionary Forces Canteens
- EFERCCS
- Eastern Fortress Establishment, Royal Canadian Corps of Signals
- EFM
- Expeditionary Force Message
- EFTS
- EFTS Elementary Flying Training School(s)
- EGSTech
- Electrical Generating Systems Technician
- EGSUP
- Eastern Group Supply Council
- EHU
- Engineer Holding Unit
- EI
- Essential Industry
- EinC
- Engineer-in-Chief
- EInC
- Engineer-in-Chief Naval Service
- EINLO
- Royal Indian Naval Liaison Officer
- EIS
- Equipment Issue Scale
- EISIS
- East Indies Merchant Shipping Intelligence
- EL
- Air Artificer (Electrics)
- EL
- Embarkation Leave
- ElA/Lieut-Cdr
- Electrical Acting Lieutenant-Commander
- ELanR
- East Lancashire regiment
- ElCr
- Electrical Commander
- Elect
- Electrician
- ElL
- Electrical Lieutenant
- ElLCr
- Electrical Lieutenant Commander
- ElMTech
- Electro-Mechanical Technician
- ELOC
- Essential Level of Capability
- ElSL
- Electrical Sub-Lieutenant
- EM
- Engineering Mechanic
- EM
- Electrical Mechanic
- EM
- Efficiency Medal
- EM
- Electrician's Mate
- Emb
- Embarked - went aboard ship for departure overseas; Canada to Britain or Canada to France
- EmbL
- Embarkation Leave
- EmbLve
- Embarkation Leave
- EMH
- Edmunston Military Hospital
- EMH
- Esquimalt Military Hospital
- EMHRCAMC
- Edmonton Military Hospital, Royal Canadian Army Medical Corps
- EMHRCAMC
- Espanola Military Hospital, Royal Canadian Army Medical Corps
- Emp
- Employed
- Emp
- Employment
- Empl'd
- Employed
- EN
- Ensign
- Engn
- Engineman
- Engr
- Engineer
- Engrs
- Director of Engineer Services
- Engrs
- Engineers
- Ens
- Ensign
- ENSA
- Entertainments National Services Association
- ent
- Entitled
- Entg.
- Entrenching
- EO
- Enabling Objective
- EO
- Engineer Officer
- EOFS
- Engineer Officer French Ships
- EOP
- Engineer Officer Personnel (Naval)
- EOR
- Eastern Ontario Regiment
- EORCE
- Executive Officer, Royal Canadian Engineers
- EORD
- Eastern Ontario Regimental Depot -facility in England used to assemble men and to store and administer equipment and materials
- EP
- Employment Platoon
- EP
- Estimated Position
- EPB
- Exercise Polar Bear
- EPZ
- Enter Promotion Zone
- Eqpm.Ass't
- Equipment Assistant
- Eqpt
- Equipment
- Equipt(N)
- Equipment Division (Naval)
- ER
- Engine Room Artificer
- ER
- Engineering Technician
- ER
- Elgin Regiment
- ER
- Essex Regiment
- ERA(A)
- Engine Room Artificer (Apprentice)
- ERA,1c(or2c,3c,4c,5c)
- Engine Room Artificer, 1st Class (or 2nd,3rd,4th or 5th Class)
- ERO
- Emergency Repair Officer
- ERofYorkY
- East Riding of Yorkshire Yeomanry
- ERRatings
- Engine Room Ratings
- ERU
- Engineer Reinforcement Unit
- ES
- Emergency Service
- ES&W
- Engineer Services & Works
- ES&WCoy
- Engineer Survey and Works Company
- ESBD
- Engineer Stores Base Depot
- ESCMFGHQ
- Educational Services Central Mediterranean Force General Headquarters
- ESO
- Embarkation Staff Officer
- ESR
- Essex Scottish Regiment
- EssexR
- Essex Regiment
- EssexYeo
- Essex Yeomanry
- ESSRCE
- Engineer Stores Section, Royal Canadian Engineers
- Est
- Estimates
- Est
- Establish, established or establishment
- Estab
- Establishment
- ESurrR
- East Surrey Regiment
- ET
- Electrical Technician
- ETA
- Estimated / Expected Time of Arrival (U.S.)
- ETC
- Embarkation Transit Camp
- ETD
- Expected Time of Departure (U.S.)
- ETech
- Electrical Technician
- ETech(A)
- Electrical Technician (Air)
- ETOUSA
- European Theatre of Operations, U. S. A.
- ETP
- Estimated Time of Departure (U.S.)
- ETQMS
- Engineer Technical Quartermaster Sergeant
- ETU
- Embarkation Transit Unit
- EU
- Entertainment Unit
- Evac
- Evacuated
- Ex
- Expeditionary
- EXFCECAN
- Expeditionary Force Canteen
- Exp
- Expeditionary
- Exptl
- Experimental
- Ext Aff
- External Affairs
- External
- Canadian Department of External Affairs (Address used in telegrams)
- ExVes
- Examination Vessels
- EYorkR
- East Yorkshire Regiment
Military abbreviations used in service files starting with F
- F&E
- Furniture and Effects
- F&G
- France and Germany
- F(A)SCRCE
- Field (Air) Survey Company, Royal Canadian Engineers
- F/
- Flight
- F/C
- Fire Control (Gunnery)
- F/C
- Flight Commander
- F/FS
- French Ship Manned by Fighting French
- F/L
- Flight Lieutenant
- F/Lt
- Flight Lieutenant
- F/O
- Flying Officer
- F/S
- Flight Sergeant
- FA
- Field Ambulance
- FA
- Field Artillery
- FA
- Financial Adviser, Joint Air Training Plan (Air)
- FA/SO
- Fleet Anti-Submarine Officer
- FAA
- Fleet Air Arm
- FAB
- Field Artillery Bridge
- FACRCAMC
- Field Ambulance Charlottetown, Royal Canadian Army Medical Corps
- FAD
- Field Ambulance Details
- FAD(D)RCASC
- Field Ambulance Details (Division) Royal Canadian Army Service Corps
- FADRCAMC
- Field Ambulance Detachments, Royal Canadian Army Medical Corps
- FAE
- Fleet Adviser of Education
- FAHRCAMC
- Field Ambulance Halifax, Royal Canadian Army Medical Corps
- Famb
- Field Ambulance
- FANYC
- First Aid Nursing Yeomanry Corps
- FAO
- Fleet Accountant Officer
- FAP
- Farrier Sergeant
- FAP
- First Aid Post
- FAP
- For All Purpose
- FAPHRCAMC
- Field Ambulance Point Hawkesbury, Royal Canadian Army Medical Corps
- FARCAMC
- Field Ambulance Royal Canadian Army Medical Corps
- Farr
- Farrier
- FAS
- First Army Signals
- FATO
- Fleet Air Arm Technical Officer
- FAVO
- Fleet Aviation Officer
- FAW/SSRCOC
- Field Artillery Workshop Section Royal Canadian Ordnance Corps
- FB&JW
- Forest Bush & Jungle Warfare
- FBE
- Floating boat equipment
- FBRCA
- Field Battery, Royal Canadian Artillery
- FBRCACASF
- Field Brigade, Royal Canadian Artillery, Canadian Active Service Force
- FBRCASC
- Field Bakery, Royal Canadian Army Service Corps
- FBSO
- Fleet Bomb Safety Officer
- FC
- Ferry Commands
- FC
- Fire Controlman
- FC
- Flag Captain
- FC"Z"F
- Fire Command "Z" Force
- FCAHQPRCE
- First Canadian Army Headquarters Platoon, Royal Canadian Engineers
- FCAIOPCIC
- First Canadian Army Intelligence Officers Pool, Canadian Intelligence Corps
- FCAIS
- First Canadian Army Intelligence School
- FCASIGPHQ
- First Canadian Army Service Increment Group Headquarters
- FCASS
- First Canadian Army Sniping School
- FCATCCRCASC
- First Canadian Army Troops Composite Company, Royal Canadian Army Service Corps
- FCATRTC
- First Canadian Army Troops Reinforcement Transit Camp
- FCATW/SRCOC
- First Canadian Army Troops Workshop, Royal Canadian Ordnance Corps
- FCC
- Fleet Constructor Officer
- FCCP
- Forage Caps Concert Panty
- FCDCASS
- "Forage Caps" Detachment Canadian Auxiliary Services Section
- FCO
- Field Cash Office
- FCRCASC
- Fortress Company, Canadian Active Service Force
- FCRCECASF
- Field Company Royal Canadian Engineers, Canadian Active Service Force
- FCST
- Forecast (U.S.)
- FCtlmn
- Fire Controlman
- Fd
- Field
- FD
- Fuel Depots
- Fd Pk Coy
- Field (Park) Company
- Fd Pk Sqn (Tp)
- Field (Park) Squadron (Troop)
- Fd Svy Coy
- Field Survey Company
- FdAmb
- Field Ambulance
- FDC
- Fighter Direction Centre
- FDE
- Final Discharge Establishment
- FdeMR
- Fusiliers de Mont Royal (French only)
- FDL
- Fusiliers de Mont Royal
- FDO
- Fusiliers de Sherbrooke
- FDO
- Fleet Dental Officer
- FDS
- Field Dressing Station
- FDT
- Fighter Direction Tenders
- FduSL
- Fusiliers du St. Laurent
- FE
- Field Engineer
- FE
- Financial Encumbrance
- FE&MCRCE
- Fortress E. & M. Company Royal Canadian Engineers
- FECA
- Force Eskimo C.A.
- FEO
- Fleet Education Officer
- FEO
- Fleet Engineer Officer
- Fervour
- Government of Canada Hong Kong (Address used in telegrams)
- FES
- Field Educational Section
- FES
- Field Experimental Station
- FES
- Flight Engineer School
- FF
- Field Force
- FF
- Fire Fighter
- FF
- Fire Fighting
- FFH
- Frigate, Helicopter Equipped
- FFI
- French Forces of the Interior
- FFK
- Fort Frontenac Kingston
- FGCM
- Field General Court-Martial
- FGH
- Fort Garry Horse
- FGHRR
- Fort Garry Horse Reserve Regiment
- FGO
- Fleet Gunnery Officer
- Fgt
- Frigate
- FH
- Field Hospital
- FHP
- Force Health Protection
- FHPHIRCAMC
- Fort Henry Permanent Hospital Installation, Royal Canadian Army Medical Corps
- FHQS
- Farnham Headquarters Staff
- FI
- Fireman
- FIC
- Fredericton Internment Camp
- FID
- Field Intelligence Department
- FilmPL
- Film Projectionist Librarian
- Fin
- Financial
- Fin Clk
- Finance Clerk
- FinO
- Financial Officer
- Fireftr
- Fire Fighter
- FIS
- Flying Instructors School
- FIS
- Foreign Intelligence Section (Naval)
- FL
- Flag Lieutenant
- FL
- Flying List
- FLAMBO
- Allied Forces Headquarters OR Air Force Headquarters, Advanced Administrative Echelon
- FLC
- Flag Lieutenant Commander
- Fld
- Field
- Fld Eng
- Field Engineer
- Fld Pk Coy (or Sqn)
- Field Park Company
- FLD Pk Sqn
- Filed Park Squadron
- FLE
- Fleet (U.S.)
- FLE
- Flight Engineer
- FLO
- Flag Liaison Officer
- FLOT
- Flotilla (U.S.)
- FLS(PO)
- French Liaison Service, Portsmouth
- Flt
- Flight
- FLT
- Fleet (U.S.)
- Flt Eng
- Flight Engineer
- Flt/Sgt
- Flight Sergeant
- FltSLt
- Flight Sub-Lieutenant
- FLY
- Flight (U.S.)
- FM
- Air Mechanic (Air Frames)
- FM
- Field Marshall
- FMC
- Mobile Command
- FMHRCAMC
- Farnham Military Hospital, Royal Canadian Army Medical Corps
- FMHRCAMC
- Fredericton Military Hospital, Royal Canadian Army Medical Corps
- Fmn
- Fireman
- FMO
- Field Marching Order
- FMO
- Fleet Mail Officer
- FMO
- Fleet Medical Officer
- FMO
- Fleet Meteorological Officer
- FMR
- Fusiliers de Mont Royal (French only)
- FMR
- Frontier Mounted Rifles
- FND
- Flinders Naval Depot
- FNGB
- French Navy in Great Britain
- FNO
- Fleet Navigating Officer
- FO(S)
- Flag Officer, Submarines
- FOA
- Field Operations Allowance
- FOAM
- Flag Officer Attached General Headquarters Middle East
- FOC
- Flag Officer Commanding
- FOCOS
- Flag Officer Commanding Orkneys and Shetlands
- FOCRF
- Flag Officer Commanding Reserve Fleet
- FOCRIN
- Flag Officer Commanding Royal Indian Navy
- FOCS
- Flag Officer Cruiser Squadron
- FOCT
- Flag Officer Carrier Training
- FOCWAF
- Flag Officer Commanding West Africa
- FOEA
- Flag Officer East Africa and Zanzibar
- FOGMA
- Flag Officer Gibraltar and Mediterranean Approaches
- FOGMO
- Fitting Out Gun Mounting Overseer
- FOGO
- Fitting Out Gunnery Officer
- FOH
- French Official History
- FOIC
- Flag Officer-in-Charge
- FOICNI
- Flag Officer-in-Charge, Northern Ireland
- Fol
- Folio
- FOLEM
- Flag Officer Levant and Eastern Mediterranean
- FOLUS
- Flag Officer Liaison with Cdr. U.S. Naval Forces
- FOMHRCAMC
- Fort Osborne Military Hospital, Royal Canadian Army Medical Corps
- FONAS
- Flag Officer Naval Air Stations
- FONF
- Flag Officer Newfoundland Force
- FOO
- Forward Observation Officer
- FOOAF
- Flag Officer Overseas Assault Force
- FOPS
- Future Operation Planning Section
- For
- Forestry
- FOR
- Force (U.S.)
- Forf
- Forfeits
- Form
- Formation
- FORSCA
- Flag Officer Red Sea and Canal Area
- Fort (E & M) Coy
- Fortress (Electrical and Mechanical) Company
- FOSY
- Flag Officer, Syracuse
- FOTALI
- Flag Officer Taranto, Royal Armoured Corps, Adriatic and for Liaison Duty With Italians
- FOW, Med
- Flag Officer Western Mediterranean
- FOWIT
- Flag Officer Western Italy
- FOYE
- Flag Officer, ''Y'' Entries
- FP
- Field Punishment
- FPB
- Force Polar Bear
- FPCRCE
- Field Park Company, Royal Canadian Engineers
- FPCRCE(AP)
- Field Park Company, Royal Canadian Engineers (Advance Party)
- FPNo(or#)1or2
- Field Punishment Number One or Two
- FPO
- Fire Prevention Officer
- FPS
- Fixed Period of Service
- FPSRCE
- Field Park Squadron, Royal Canadian Engineers
- FPSRCE(A)D
- Field Park Squadron, Royal Canadian Engineers (Armoured) Division
- FPTCRCE
- Field Park Troop Company, Royal Canadian Engineers
- FR
- Fishermen's Reserve
- FR&I
- Financial Regulations & Instructions
- FR(S-P)RCA
- Field Regiment (Self-Propelled), Royal Canadian Artillery
- Fr,Fro
- From
- FRA
- Freetown Area
- Frac
- Fractured - medical term for a broken bone
- FRADO
- Fleet Radar Officer
- Freq
- Frequency
- Fri
- Frigate
- FRMO
- Fleet Royal Marine Officer
- FRO
- Fleet P. and Radio Telephony Officer
- FRRCHA
- Field Regiment, Royal Canadian Horse Artillery
- FS
- Financial Superintendent
- FS
- Flat Scow
- FS
- Flight Sergeant
- FSA
- Fleet Signal Assistant
- FSA
- Food Service Attendant
- FSBRCA
- Flash Spotting Battery, Royal Canadian Artillery
- FSC
- Farnham Summer Camp
- FSDRCE
- Field Survey Depot, Royal Canadian Engineers
- FSgt
- Flight Sergeant
- FSjt
- Flight Sergeant
- FSMO
- Field Service Marching Order
- FSO
- Fleet Signal Officer
- FSP
- Foreign Service Premium
- FSqn
- Fighter Squadron (Royal Canadian Air Force)
- FSR
- Field Service Regulations
- FSRCCS
- Fortress Signals, Royal Canadian Corps of Signals
- FSRCE
- Field Squadron, Royal Canadian Engineers
- FSS
- Field Security Section
- FSSCRU
- Field Security Section Canadian Reinforcement Unit
- FST
- Forward Surgical Team
- FSVC
- Food Services
- FT
- French Translator
- FTC
- Field Trials Camp
- FtCdt
- Flight Cadet
- FTCE
- Field Troop Canadian Engineers
- FTO
- Fleet Torpedo Officer
- FTO
- French Technical Officer
- FtPayr
- Fleet Paymaster
- FtrCOp
- Fighter Control Operator
- FTS
- Flying Training School
- FTU
- Ferry Training Unit
- Furl
- Furlough
- Fus
- Fusilier(s)
- FusDuSher
- Fusiliers de Sherbrooke (French only)
- FW
- Fighter Wing
- FW
- Foreman of Works
- FW/SRCOC
- Fortress Workshop, Royal Canadian Ordnance Corps
- FWA
- Fleet Wireless Assistant
- Fwd
- Forward or Forwarded
- Fwm
- Forewoman
- FWO
- Fleet Wireless Officer
- FWTCRCA
- Fortress Weapon Training Camp, Royal Canadian Artillery
- FY
- Patrol Vessel, Yacht (U.S.)
- FYA
- Fort York Armouries
Military abbreviations used in service files starting with G
- G
- General Staff Branch of the Staff
- G
- Gunnery
- G (Ops)
- General Staff (Operations)
- G&SF
- Grey & Simcoe Foresters
- G/C
- Group Captain
- GA
- Gunnery Armourer
- GAF
- Granted Annual Furlough
- GAT
- Guantanamo-Trinidad convoy
- GB
- Garrison Battalion
- GBCODRCOC
- Goose Bay Company Ordnance Depot, Royal Canadian Ordnance Corps
- GBD
- Goose Bay Defences
- GBE
- Knight Grand Cross of the Order of the British Empire
- GBMS
- Great Britain Merchant Ships (a wireless message routine)
- GBSRCASC
- Goose Bay Section, Royal Canadian Army Service Corps
- GC
- George Cross
- GC
- Greek Catholic
- GC
- Good Conduct Badge - award for good conduct during service
- GCACon
- Ground Controlled Approach Controller
- GCB
- Knight Grand Cross of the Order of the Bath
- GCCS
- Government Code and Cypher School
- GCM
- General Court Martial
- GCMG
- Knight Grand Cross of the Order of St.Michael and St.George
- GCMG
- Knight Grand Cross of St. Michael and St. George
- GCT
- Greenwich Civil Time
- GCVO
- Knight Grand Cross of the Royal Victorian Order
- GD
- General Duties
- GD
- Group Duties
- Gdefmn
- Ground Defenceman
- Gdfk
- Goldflake
- GDL&RS
- Guard Detachment Lanark & Renfrew Scottish Regiment
- Gdsm
- Guardsman
- GDSMGR
- Guards Machine Gun Regiment
- GE
- Garrison Engineer
- GEC
- General Employment Company
- Gen
- General - commanding officer at division or corps level
- Gen Hosp
- General Hospital
- Gen Pnr Coy
- General Pioneer Company
- Geo
- Geographical Section, General Staff
- GF
- Operation ''Goldflake''
- GFORCE
- Labrador
- GGBG
- Governor General's Body Guard
- GGDS
- Grenadier Guards
- GGFG
- Governor General's Foot Guards (Now 21st Armoured Regiment)
- GGHG
- Governor General's Horse Guards
- GH
- General Hospital
- GHMHRCAMC
- Gordon Head Military Hospital, Royal Canadian Army Medical Corps
- GHQ
- Group Headquarters
- GHQ
- General Headquarters - command centre from which corps or army commanders direct the war
- GHQ&LofCTSI
- General Headquarters and Line of Communication Troops Service Increment
- GHQEIC
- General Headquarters Echelon Indian Command
- GHQRUHofC
- General Headquarters Reconnaissance Unit Highlanders of Canada
- GHQSWPA
- General Headquarters South West Pacific Area
- GHRCAMC
- General Hospital, Royal Canadian Army Medical Corps
- GI
- Gunnery Instructor
- GIRO
- General Instructions Routing Officers
- GIS
- Ground Instructors School
- GJL
- Granted Jewish Leave
- GlamYeo
- Glamorgan Yeomanry
- GLICHRCAMC
- Grande Ligne Internal Camp Hospital, Royal Canadian Army Medical Corps
- GloucR
- Gloucestershire Regiment
- GLS
- General Labour Section
- GM
- George Medal
- GMA
- Gibraltar, Morocco Area
- GMHRCAMC
- Gaspe Military Hospital, Royal Canadian Army Medical Corps
- GMHRCAMC
- Gravenhurst Military Hospital, Royal Canadian Army Medical Corps
- GMO
- Gun Mounting Overseer
- GMP
- Garrison Military Police
- GMT
- Greenwich Mean Time
- GN
- Guantanamo-New York convoy
- GNA
- Greek Naval Attache
- GNLO
- Greek Naval Liaison Officer
- Gnr
- Gunner - lowest rank in the Royal Canadian Artillery (equivalent to private)
- G'nr
- Gunner - lowest rank in the Royal Canadian Artillery (equivalent to private)
- GO
- Greek Orthodox (Church)
- GO
- Gunnery Officer
- GO
- General Order
- GO(s)
- General Order(s)
- GOC
- General Officer Commanding - highest ranking general, usually at corps level
- GOC (in C)
- General Officer Commanding (in Chief) - highest ranking general, usually at corps level
- GOCHMSRCAMC
- Garnons Officers Convalescent Home Military Staff, Royal Canadian Army Medical Corps
- GOCinC
- General Staff (Operations)
- GOCRA
- General Officer Commanding Royal Artillery
- GOCRM
- General Officer Commanding Royal Marines
- GOH
- German Official History
- GOR
- Gun Operational Room
- GordHighrs
- Gordon Highlanders
- GOSShip
- Norwegian Whaler
- Gov-Gen
- Governor General
- Gp
- Group
- GPCRCE
- General Pioneer Company, Royal Canadian Engineers
- GPL
- Granted Privileged Leave
- GPMHRCAMC
- Grande Prairie Military Hospital, Royal Canadian Army Medical Corps
- GPO
- Gun Position Officer
- GPOA
- Gun Position Officer Assistant
- GPSRCE
- General Pioneer Section, Royal Canadian Engineers
- GR
- Group (US)
- GRC
- Graves Registration Cross
- GreySimFor
- Grey & Simcoe Foresters
- Grn
- Garrison
- GRO
- General Routine Order
- GRP
- Group
- GRS
- General Reconnaissance School
- GRS
- General Reconnaissance Squadron
- GRSTD
- Gun Room Steward
- GRT
- Gross Registered Tonnage
- GRU
- General Reinforcement Unit
- GS
- Greek Ship
- GS
- Greenland-Sydney Convoy
- GS
- General Staff
- GS
- General Service
- GSB
- General Staff Branch
- GSC
- Gunnery Staff Course
- GSF
- Gulf Sea Frontier
- GSGS
- Geographical Section General Staff
- GSL
- Granted Short Leave
- GSO
- General Staff Officer
- GSO
- General Staff Order
- GSO 1, 2, or 3
- General Staff Officer, 1st, 2nd or 3rd Grade
- GSO1
- General Staff Officer, Grade 1
- GSP
- General Staff Planning
- Gsr
- Greaser
- GSSR
- General Service Special Reserve
- GSW
- Gun Shot Wound - wound caused by a bullet
- GTC
- Government Telegraph Code
- GTC(RCASC)CD
- General Transport Company, (Royal Canadian Army Service Corps), Canadian Division
- Gtd
- Granted
- GU
- Gunner
- GU
- Gibraltar-United States Convoy
- GUI
- Guide
- Gunner (T)
- Torpedo Gunner
- GV
- Gate Vessels
- GWCBD
- "G" Wing Canadian Base Depot
- GWCFC
- General Workshop, Canadian Field Company OR Canadian Forestry Corps
- GZ
- Guantanamo-Panama convoy
Military abbreviations used in service files starting with H
- H&NPAO
- Hamilton & Niagara Peninsula Area Orders
- H&PER
- Hastings & Prince Edward Regiment
- H(21AG)
- Hospitalization Central Mediterranean Force (Allied Armies Italy)
- H/
- Honourary (Rank)
- H/
- Honorary (Rank)
- H/
- Honorary or Honourable
- H/Capt
- Honorary Captain
- H/Capt
- Honorary Captain (Canadian Chaplain Service)
- H/F
- High Frequency
- HA
- Honours & Awards (Records)
- HA
- Hygiene Assistant
- HA
- Halifax-Aruba convoy
- HA(A)DRCE
- Headquarters (Armoured) Division, Royal Canadian Engineers
- HA/LA
- High Angle, Low Angle (gunnery)
- HAA
- Heavy Anti-Aircraft
- HAABRCA
- Heavy Anti-Aircraft Battery, Royal Canadian Artillery
- HAAR(M)RCS
- Heavy Anti-Aircraft Regiment (Mobile) Royal Canadian Signals
- HAARSRCASC
- Heavy Anti-Aircraft Regiment Section, Royal Canadian Army Service Centre
- HAARW/SRCEME
- Heavy Anti-Aircraft Regiment Workshop, Royal Canadian Electrical and Mechanical Engineers
- HAARW/SRCOC
- Heavy Anti-Aircraft Regiment Workshop Section, Royal Canadian Ordnance Corps
- HAC
- Honourable Artillery Company
- HACArt
- Honourable Artillery Company, Artillery Section
- HACInf
- Honourable Artillery Company, Infantry Section
- HAL
- Halifax Approval Letter
- HalRif
- Halifax Rifles
- HampsR
- Hampshire Regiment
- HampsY
- Hampshire Yeomanry
- HC
- Harbour Craft
- HC
- Headquarters Company
- HC
- Honorary Captain
- HCB
- Halifax Coast Brigade
- HCC
- Hospital Conveyance Corps
- HCMF(AAI)
- Hospitalization Central Mediterranean Force (Allied Armies Italy)
- HCU
- Heavy Conversion Unit
- HD
- Holding Depot
- HD
- Home Defence
- HDC
- Harbour Defence Craft
- HDML
- Harbour Defence Motor Launch
- Hdmstr
- Headmaster
- HDPC
- Harbour Defence Patrol Crafts
- Hdqrs
- Headquarters
- HE
- Holding Establishment
- HE
- High Explosive
- HE
- His/Her Excellency
- HEP
- Height Filtering Position
- HerefordR
- Herefordshire Regiment
- HertsR
- Herefordshire Regiment
- HF
- Harassing Fire
- HF
- Home Fleet
- HF/DF
- High Frequency Direction Finding
- HFSC
- Headquarters Farnham Summer Camp
- HG
- Home Guard
- HGHRCAMC
- Horley General Hospital, Royal Canadian Army Medical Corps
- HHT
- House Hunting Trip
- HighCycBn
- Highland Cyclist Battalion
- HighLI
- Highland Light Infantry
- HKRgt
- Hong Kong Regiment
- HKS
- Hong Kong and Singapore
- HKVDC
- Hong Kong Volunteer Defence Corps
- HLD
- Higgins Tank Lighter
- HLI
- (29th Regiment) Highland Light Infantry of Canada
- HLIofC
- Highland Light Infantry of Canada
- HLMHRCAMC
- Howe Lake Military Hospital
- HLVW
- Heavy Logistics Vehicle Wheeled
- HM
- Hull Mechanic
- HM(C)S
- His/Her Majesty's (Canadian) Ship
- HMA
- Honorary Major
- HMAT
- His/Her Majesty's Auxiliary Transport
- HMB
- Heavy Mortar Battery
- HMCoastGd
- His/Her Majesty's Coast Guard
- HMCS
- His/Her Majesty's Canadian Ship
- HMFD
- Having Moved From District
- HMG
- Heavy Machine Gun
- HMHRCAMC
- Hamilton Military Hospital, Royal Canadian Army Medical Corps
- HMHRCAMC
- Huntingdon Military Hospital, Royal Canadian Army Medical Corps
- HMHRCAMC
- Halifax Military Hospital, Royal Canadian Army Medical Corps
- HMS
- His/Her Majesty's Ship - vessel under the control of the Royal Navy
- HMS
- His/Her Majesty's Service
- HMT
- His/Her Majesty's Transport
- HMT
- His/Her Majesty's Troopship - designated ship carrying troops between Canada and England and England and France
- HMTS
- His/Her Majesty's Troopship - designated ship carrying troops between Canada and England and England and France
- HNU
- Head Nurse
- HO
- Hospital Orderly
- Hon
- Honourable
- Hon
- Honorary
- HONO
- Honolulu (U.S.)
- HOSE
- Hospital Sergeant
- Hosp
- Hospital - designated location where soldiers receive medical treatment
- HouseholdBn
- Household Battalion
- HOW
- Howitzer - an artillery weapon (various calibres) capable of firing shells in a low or high arc
- HPC
- Harbour Patrol Crafts
- HPMC
- Hasting Park Military Camp
- HQ
- Headquarters - command centre for a military unit in the field (company level and above)
- HQ"C"F
- Headquarters ''C'' Force
- HQ&BD
- Headquarters & Base Details
- HQ(A)D
- Headquarters (Armoured) Division
- HQ1stD
- Headquarters 1st Division
- HQ2CdnAGRA
- (Headquarters 2 Canadian) Army Group Royal Artillery
- HQAAB
- Headquarters Anti-Aircraft Brigade
- HQAABRCA
- Headquarters Anti-Aircraft Brigade, Royal Canadian Artillery
- HQAC
- Headquarters Atlantic Command
- HQACS
- Headquarters Atlantic Command Signals
- HQADGB
- Headquarters, Air Defence Great Britain
- HQATAFCA
- Headquarters Army Troops Area First Canadian Army
- HQATD
- Headquarters Army Troops Details
- HQATSSRCS
- Headquarters Army Terminals Signal Section, Royal Canadian Signals
- HQ''B"GCHU
- Headquarters ''B'' Group Canadian Holding Unit
- HQBC
- Headquarters Bomber Command
- HQBD(GS&AS)
- Headquarters Botwood Defences (General Staff & Administrative Staff)
- HQBTNI
- Headquarters British Troops in Northern Ireland
- HQBU
- Headquarters Base Unit
- HQCA
- Headquarters Coastal Command
- HQCAA&A-TGRCA
- Headquarters Canadian Anti-Aircraft & Anti-Tank Group, Royal Canadian Artillery
- HQCAC
- Headquarters Canadian Armoured Corps
- HQCACRCASC
- Headquarters Canadian Artillery Company, Royal Canadian Army Service Corps
- HQCADARCA
- Headquarters Canadian Armoured Division Artillery, Royal Canadian Artillery
- HQCADREME
- Headquarters Canadian Armoured Division, Royal Electrical and Mechanical Engineers
- HQCAGRCA
- Headquarters Canadian Artillery Group, Royal Canadian Artillery
- HQCAMG
- Headquarters Canadian Army Meteorological Group
- HQ-CAPO(GS&AS)
- Headquarters - Canadian Army Post Office (General Staff & Administrative Staff)
- HQCATB
- Headquarters Canadian Army Tank Brigade
- HQCC
- Headquarters Canadian Corps
- HQCCARCA
- Headquarters Canadian Corps Artillery, Royal Canadian Artillery
- HQCCATRCASC
- Headquarters Canadian Army Troops, Royal Canadian Army Service Corps
- HQCCCTCRCASC
- Headquarters Command Canadian Corps Transport Column, Royal Canadian Army Service Corps
- HQCCE
- Headquarters Canadian Constructional Engineers
- HQCCGTC
- Headquarters Command Canadian General Transport Column
- HQCCIDRCASC
- Headquarters Command Canadian Infantry Division, Royal Canadian Army Service Corps
- HQCCTRCE
- Headquarters Canadian Corps Troops, Royal Canadian Engineers
- HQCCTREME
- Headquarters Canadian Corps Troops, Royal Electrical and Mechanical Engineers
- HQCCTTCRCASC
- Headquarters Canadian Corps Tank Transporter Column, Royal Canadian Army Service Corps
- HQCDECA(OS)
- Headquarters Canadian Divisional Engineers, Canadian Artillery OR Canadian Army (Overseas)
- HQCDRCASC
- Headquarters Canadian Division, Royal Canadian Army Service Corps
- HQCDREME
- Headquarters Canadian Division, Royal Electrical and Mechanical Engineers
- HQCEWRCE
- Headquarters Chief Engineer Works, Royal Canadian Engineers
- HQCFC
- Headquarters Canadian Forestry Corps
- HQCFN
- Headquarters Canadian Forces in the Netherlands
- HQCIB
- Headquarters Canadian Infantry Brigade
- HQCID
- Headquarters Canadian Infantry Division
- HQCProC
- Headquarters Canadian Provost Corps
- HQCPS
- Headquarters Canadian Postal Services
- HQCRCASCCCT
- Headquarters Commander, Royal Canadian Army Service Corps, Canadian Corps Troops
- HQCRCEMEFCAT
- Headquarters Commander, Royal Canadian Electrical and Mechanical Engineers, First Canadian Army Troops
- HQCRTCRCS
- Headquarters Canadian Railway Telegraph Company, Royal Canadian Signals
- HQCRU
- Headquarters Canadian Reinforcement Unit
- HQD
- Headquarters Details
- HQDCDCA
- Headquarters Deputy Commander First Canadian Army
- HQ''D''GRU
- Headquarters ''D'' Group Reinforcement Unit
- HQDIZB
- Headquarters Details Infantry "Z" Brigade
- HQDPCAPO
- Headquarters Defended Port Canadian Army Post Office
- HQDPofS
- Headquarters Defended Port of Sydney
- HQDPofSJ
- Headquarters Defended Port of Saint John
- HQDRCA
- Headquarters Division, Royal Canadian Artillery
- HQDRCASC
- Headquarters Division, Royal Canadian Army Service Corps
- HQDRCE
- Headquarters Division, Royal Canadian Engineers
- HQDRCE(AA)
- Headquarters Division, Royal Canadian Engineers, (Active Army)
- HQDRCE(RA)
- Headquarters Division, Royal Canadian Engineers, (Reserve Army)
- HQEAFME
- Headquarters Royal Air Force, Middle East
- HQEF
- Headquarters Esquimalt Fortress
- HQFCA
- Headquarters First Canadian Army
- HQFCACAS
- Headquarters First Canadian Army Civil Affairs Staff
- HQFCASRCS
- Headquarters First Canadian Army Signals, Royal Canadian Signals
- HQFCATC
- Headquarters First Canadian Army Training Camp
- HQFCATC
- Headquarters First Canadian Army Transport Column
- HQFMCCC
- Headquarters Field Maintenance Centre Canadian Corps
- HQFMCRCASC
- Headquarters Field Maintenance Centre, Royal Canadian Army Service Corps
- HQGB
- Headquarters Greek Bridge
- HQGCTU
- Headquarters Group Canadian Training Units
- HQGD
- Headquarters Gaspe Defences
- HQHF
- Headquarters Home Forces
- HQHFRCA
- Headquarters Halifax Fortress, Royal Canadian Artillery
- HQLA-CWAC
- Headquarters London Area - Canadian Women's Army Corps
- HQMARCA
- Headquarters Medium Artillery, Royal Canadian Artillery
- HQMD
- Headquarters Military District
- HQMD#1
- Headquarters Military District # 1
- HQMD#2H&NPC
- Headquarters Military District # 2, Hamilton & Niagara Peninsula Command
- HQMD#3,K
- Headquarters Military District # 3, Kingston
- HQMDNo2(NCD)
- Headquarters Military District No. 2 (Niagara Camp Details)
- HQMDVB
- Headquarters Military District Vancouver Barracks
- HQNWACAF
- Headquarters North-West African Coastal Air Force
- HQPC
- Headquarters Pacific Command
- HQPRD
- Headquarters Prince Rupert Defences
- HQRCAF
- Headquarters Royal Canadian Air Force
- HQRCD
- Headquarters Reconstituted Canadian Division
- HQRCECAT
- Headquarters, Royal Canadian Engineers, Canadian Army Troops
- HQRCEMECCT
- Headquarters, Royal Canadian Electrical and Mechanical Engineers, Canadian Troops
- HQRCEWO
- Headquarters, Royal Canadian Engineers, Works Organization
- HQS (No)
- Distinguishing letters on files of National Defence Headquarters (Army), Ottawa
- HQS&CD
- Headquarters Sydney and Canso Defences
- HQS&S-S
- Headquarters Staff and Sub-staff
- HQS(H)CAD
- Headquarters Squadron (Hussars) Canadian Armoured Division
- HQSAD
- Headquarters Squadron Armoured Division
- HQSATB (AD)
- Headquarters Squadron Army Tank Brigade (Armoured Division)
- HQSATB (NBRT)
- Headquarters Squadron Army Tank Brigade (New Brunswick Regt. Tank)
- HQSCABAP
- Headquarters Squadron Canadian Armoured Brigade Advance Party
- HQSCNPHQRCS
- Headquarters Signals Company, National Defence Headquarters Royal Canadian Signals
- HQSD
- Headquarters Shelburne Defences
- HQSD(CB)CADAF
- Headquarters Squadron Details (Camp Borden), Canadian Armoured Division Active Force
- HQSF
- Headquarters Sydney Fortress
- HQSG
- Headquarters Support Group
- HQSGCAD
- Headquarters Support Group Canadian Armoured Division
- HQSHDCAPO
- Headquarters St. John's Defences Canadian Army Post Office
- HQSMD
- Headquarters Staff Military District
- HQSPC
- Headquarters Staff Petawawa Camp
- HQS-SDTA
- Headquarters Sub-Staff Dunburn Training Area
- HQSVC
- Headquarters Staff Valcartier Camp
- HQTC
- Headquarters Tracadie Camp
- HQV&EF
- Headquarters Victoria & Esquimalt Fortress
- HQVB
- Headquarters Vancouver Barracks
- HQVD
- Headquarters Vancouver Defences
- HQVGofC
- Headquarters Veterans Guard of Canada
- HR
- Halifax Rifles
- HR
- Hospital Records
- HR
- Human Resources
- HRH
- His/Her Royal Highness
- HRR
- Heals Rifles
- Hrs
- Hours
- HRS
- Heavy Repair Shop
- HRS
- Hussars
- HRW(MT)RCASC
- Heavy Repair Workshop (Mechanical Transport) Royal Canadian Army Service Corps
- HS
- Home Sister
- HS
- Hellenic Ship
- HSBPT
- High Speed Battle Practice Target
- HSCRFU
- Home Security Course Reserve Fleet Units
- HSS
- Hospital Staff Sergeant
- HST
- Hospital Steward
- HSTS
- High Speed Target Service
- HT
- Halifax-Trinidad Convoy
- HT
- Hull Technician
- HT
- Horse Transport
- HTech
- Hull Technician
- HTM
- Heavy Trench Mortar
- HTS
- Heavy Transport Squadron
- HU
- Holding Unit
- HuntsCyclistBn
- Huntingdonshire Cyclist Battalion
- Hvy
- Heavy
- HWE
- Home War Establishment
- Hwr
- Howitzer
- HX
- Halifax (New York) to United Kingdom Convoy
- HXF
- Fast Halifax (New York) to United Kingdom Convoy
- Hy
- Heavy
- Hyg
- Hygiene
- HygTech
- Hygiene Technician
Military abbreviations used in service files starting with I
- I
- Intelligence Branch of the General Staff
- I
- Interrogation
- I (b)
- Secret Service Branch of the General Staff
- I"E"toHQCT
- Increment ''E'' to Headquarters Canadian Troops
- I(A)HQCAGRA
- Increment (A) Headquarters Canadian, Army Group Royal Artillery
- I/C
- In Charge
- IAF
- Inspector of Admiralty Fuel
- IAM
- Institute of Aviation Medicine
- IAS
- Infantry Assault Ships
- IATC
- Infantry Advanced Training Center
- I''A''toCSGHQEAP
- Increment ''A'' to Canadian Section
- IAW
- In Accordance With
- IBD
- Infantry Base Depot
- IBDCASF(LS)
- Infantry Base Depot, Canadian Active Service Force, (Lorne Scots)
- IBDP
- Infantry Brigade Defence Platoon
- IBLAD
- Infantry Brigade Light Aid Detachment
- IBofUK&C
- Inspection Board of United Kingdom & Canada
- IBRS
- Infantry Brigade Recce Squadron
- IBSS&WT
- Infantry Brigade Signals Section & Wireless Telegraphy
- IC
- Instructional Cadre
- IC
- Internment Camp
- IC
- In Command
- ICB
- Inspection of Contract Built Ships
- ICB
- Inspector of Contract Built Ships
- ICB
- Inspector of Contract Built Ships (Naval)
- ICCDP
- Iceland Coastal Command Daily Programme
- ICCFS
- Inspecting Captain Of Coastal Force Schools
- ICCPC
- Internment Camp Canadian Provost Corps
- ICCSSMedal
- International Commission of Control and Supervision Service Medal (Vietnam)
- ICE
- Integrated Clothing Ensemble
- ICEPAT.
- Iceland Patrol (U.S.)
- ICFPC
- Increment Canadian Field Punishment Camp
- ICI
- Imperial Chemical Industries
- ICMHRCAMC
- Internment Camp Military Hospital, Royal Canadian Army Medical Corps
- ICSCS Medal
- International Commission for Supervision and Control Service Medal (Indo China)
- IDE
- Imperial Defence College or Inter-Department Cypher
- IdentTech
- Identification Technician
- IDGHRCAMC
- Infectious Diseases General Hospital, Royal Canadian Army Medical Corps
- IE
- Increased Endurance
- IE
- Intermediate Engagement
- IECS
- Improved Environmental Clothing System
- IETech
- Instrument Electrical Technician
- IF
- Irish Fusiliers
- IFofC
- Irish Fusiliers of Canada (11th Regiment)
- IFPP
- No. 1 Ferry Pilots Pool
- IFS
- Instrument Flying School
- IG(CC)
- Inspector-General (Central Canada)
- IGC
- Imperial General Council
- IGds
- Irish Guards
- I-GEC(A)
- Inspector-General Eastern Canada (Army)
- IGTCAC
- Instructors Gunnery Team, Canadian Armoured Corps
- IHU
- Infantry Holding Unit
- IMD
- Indian Medical Department
- IMHRCAMC
- Ipperwash Military Hospital, Royal Canadian Army Medical Corps
- Imp
- Imperial
- IMS
- Indian Medical Service
- IMTU
- Inspector of Machine Tool Utilisation
- In
- Inch
- IN
- Inspector
- INAITCoy
- Infantry Brigade AIT Company
- Incl
- include, included, inclusive or including
- ind
- independent
- IndefLve
- Indefinite Leave
- indep
- independent
- Inf
- Infantryman
- Inf
- Infantry
- Infmn
- Infantryman
- INFO
- Information
- Inj
- Injured
- INO(W)
- Inspector of Naval Ordnance (Woolwick)
- Inspr
- Inspector
- inst
- Instruct, instructed, instruction or instructor
- Instr
- Instruction(al)
- Instr(s)
- Instructor(s)
- InstrCr
- Instructor Commander
- int
- Intelligence
- INT
- Interpreter
- Int.
- General Staff Officer 1 (Intelligence)
- IntC
- Internment Camp
- INTEL
- Intelligence (U.S.)
- IntOp
- Intelligence Operator
- Intrep
- Intelligence Report
- inv
- Invalid
- Inv"wd"
- Invalided Wounded - a soldier transferred away from the front as a result of wounds received in action
- INWE
- Infantry North West Echelon
- IO
- Intelligence Officer
- I-O
- Infantry Officers
- IO/SB.C.D.C.
- Intermediate Overseas Base, Canadian Dental Corps OR Canadian Disciplinary Centre
- IOA
- Indian Ocean Area
- IOB
- Inspector of Booms (Naval)
- IOC
- Instructional Officer Course
- IODE
- Imperial Order of the Daughters of the Empire
- IORAS
- Inspection of Reserve Army Stores
- IOS
- Inspector of Ordnance Services
- IPB
- Intelligence Preparation of Battlefield
- IPC
- Island Park Camp
- IPO
- Inshore Patrol Officer
- IR
- Instructor's Regiment
- Ir.Fus.(VR)
- Irish Fusiliers (Vancouver Regiment)
- IREM
- Inspector of Royal Engineer Machinery
- IrGds
- Irish Guards
- IrofC
- Irish Regiment of Canada
- IRS
- Intelligence Reports Section (Naval)
- IRVC
- Imperial Railways Volunteer Corps
- IS Tech
- Integral Systems Technician
- IS.C.B.
- Inter-Service Communications Board (U.S.)
- ISC
- Inter Service Committee
- ISC
- Inter-Service Cypher
- ISC
- Indian Staff Corps
- ISCC
- Infantry Section Commander's Course
- ISCO
- Intelligence Section, Combined Operations
- ISF
- Internal Security Force
- ISHQCC
- Intelligence Section Headquarters Canadian Corps
- ISO
- Imperial Service Order
- ISp
- Intelligence Specialist
- ISTAR
- Intelligence, Surveillance, Target Acquisition and Reconnaissance
- ISTD
- Inter-Service Topographical
- ISTDC
- Interservice Training Defence Centre
- IT
- Instructional Technique
- ITB
- Infantry Training Battalion
- ITC
- Infantry Training Centre
- ITC(R)
- Infantry Training Centre (Reserve)
- ITD
- Infantry Training Depot
- ITDUCIC
- Infantry Training Demonstration Unit, Canadian Infantry Corps
- ITech
- Instrument Technician
- ITM
- Inspector of Torpedoes and Mines
- ItoHQCC
- Increment to Headquarters Canadian Corps
- ItoHQCID
- Increment to Headquarters Canadian Armoured Division
- ITS
- Initial Training School
- IW.C.B.D.
- 'I'' Wing Canadian Base Depot
- IWBB
- Improvised Widened Bailey Bridge
- IWDRE
- Inland Waterways & Docks, Royal Engineers
- IWGC
- Imperial War Graves Commission
- IWT
- Inland Water Transport
- IYB
- Imperial Yeomanry Bearer
- IYH
- Imperial Yeomanry Hospital
Military abbreviations used in service files starting with J
- J
- Jewish
- JABCA
- Joint Atomic, Biological and Chemical Defensive Warfare School
- JAG
- Judge Advocate General
- JAN
- Joint Army & Navy Radio Procedure
- JATP
- Joint Air Training Plan
- JEW
- Jewish
- JFHQ
- Joint Force Headquarters
- JIMRTTRG
- Job Inspector Mechanical Relations Transportation Training
- JINSTOR
- Job Instructor
- JIX
- Unclassified Ships (U.S)
- JLS
- Junior Leader's School
- JLS
- Japanese Language School
- JLTC
- Junior Leader's Training Centre
- JMC
- Johnson Method of Coaching
- JMHRCAMC
- Joliette Military Hospital, Royal Canadian Army Medical Corps
- JMT
- Job method training
- Joiner
- Joiner
- JP
- Joint Planners
- JR
- Régiment de Joliette (available in french only)
- JRT
- Job Relations Training
- JSC
- Joint Services Committee
- JSM
- Joint Staff Mission
- JSU
- Junior Sergeant
- JTC
- Jasper Training Camp
- JTF2
- Joint Task Force 2
- JWEC
- Junior War Establishments Committee
- JWPS
- Joint War Production Staff
Military abbreviations used in service files starting with K
- k
- knots
- K
- King or King's
- K&BMHRCAMC
- Kingston & Barriefield Military Hospital, Royal Canadian Army Medical Corps
- KAR
- King's African Rifles
- KBO
- Kildare Barracks Ottawa
- KBR
- Kellogg Brown and Root
- KC
- King's Commendation
- KCB
- Knight Commander of the Order of the Bath
- KCMG
- Knight Commander of the Order of St. Michael and St. George
- KEdwH
- King Edward's Horse
- Kent R
- Kent Regiment
- KentCycBn
- Kent Cyclist Battalion
- KG
- Knight of the Order of the Garter
- KHM
- King's Harbour Master
- KIA
- Killed In Action - designation of how a soldier died
- KMB
- Kabul Multi-National Brigade
- KMHRCAMC
- Kingston Military Hospital, Royal Canadian Army Medical Corps
- KMHRCAMC
- Kitchener Military Hospital, Royal Canadian Army Medical Corps
- KMW
- Senior Polish Naval Officer in London
- KORC
- King's Own Rifles of Canada
- KORofC
- King's Own Rifles of Canada
- KOSB
- King's Own Scottish Borderers
- KOYLI
- King's Own Yorkshire Light Infantry
- KPHIRCAMC
- Kingston Permanent Hospital Installation, Royal Canadian Army Medical Corps
- KPIB
- Key Points Investigation Bureau
- KR
- King's Regulations
- KR
- Kent Regiment
- KR&ACI
- King's Regulations & Air Council Instructions
- KR&AI
- King's Regulations & Admiralty Instructions
- KR&O
- King's Regulations and Orders
- KRandAI
- King's Regulations and Admiralty Instructions
- KRCN
- King's Regulations for the Government of the Canadian Naval Service
- KRR
- King's Royal Rifle Corps
- KRRC
- King's Royal Rifle Corps
- KRRifC
- King's Royal Rifle Corps
- KSLI
- King's Shropshire Light Infantry
- KTDRCA
- Kine Theodolite Detachment, Royal Canadian Artillery
- KTS
- Composite Training School (Royal Canadian Air Force)
- KUF
- Polish Drafting Officer, London
Military abbreviations used in service files starting with L
- L
- Lieutenant
- L of C
- Line(s) of Communication
- L&RSGD
- Lanark & Renfrew Scottish Guard Detachment
- L&RSR
- Lanark & Renfrew Scottish Regiment
- L&WRegt
- Lincoln & Welland Regiment
- L/
- Lance (rank)
- L/
- Leading
- L/Bdr
- Lance Bombardier
- L/Cpl
- Lance Corporal
- L/S
- Leading Seaman
- L/SA
- Leading Stores Assistant
- L/Sgt
- Lance Sergeant
- L/Sjt
- Lance Sergeant
- L/Sto
- Leading Stoker
- LaA
- Light Aid Detachment
- LAA
- Light Anti-Aircraft
- LAARPRCASC
- Light Anti-Aircraft Regiment Platoon, Royal Canadian Army Service Corps
- LAARRCA
- Light Anti-Aircraft Regiment, Royal Canadian Artillery
- LAARSRCASC
- Light Anti-Aircraft Regiment Section, Royal Canadian Army Service Corps
- LAARSS
- Light Anti-Aircraft Regiment Signals Section
- LAARW/SSRCOC
- Light Anti-Aircraft Regiment Workshop Section, Royal Canadian Ordnance Corps
- LAATTRCA
- Light Anti-Aircraft Training Troop, Royal Canadian Artillery
- LAB
- Light Armoured Battery
- LabCorps
- Labour Corps
- LAC
- Leading Aircraftman
- LAD
- Light Aid Detachment
- LADC
- Lieutenant Aide-de-Camp
- LADCAPCS
- Light Aid Detachment Canadian Armoured Personnel Car Squadron
- LADRCEME
- Light Aid Detachment, Royal Canadian Electrical and Mechanical Engineers
- LADRCOC
- Light Aid Detachment, Royal Canadian Ordnance Corps
- LAFO
- Laboratory Foreman
- LanarkYeo
- Lanarkshire Yeomanry
- LanFus
- Lancashire Fusiliers
- LAW
- Leading Aircraftwoman
- LBandsmn
- Leading Bandsman
- LBE
- Landing Barge, Emergency Repair
- LBF
- Landing Barge, Flak
- LBF
- Landing Boats
- LBM
- Landing Boats
- LBO
- Landing Barge, Oiler
- LBS
- Landing Barge, Support
- LBV(1)
- Landing Barge Vehicle (Mark I)
- LBV(L)(2)
- Landing Barge Vehicle (Large, Mark II)
- LBV(S)(2)
- Landing Barge Vehicle (Small, Mark II)
- LBW
- Landing Barge Water
- LC
- Lieutenant-Colonel
- LC
- Landing Craft
- LCA
- Landing Craft Assault
- LCA(HR)
- Landing Craft (Hedgerow) (U.S.)
- LCB(D)
- Landing Craft Barge (Dumb) (U.S.)
- LCB(M)
- Landing Craft Barge (Mechanised) (U.S.)
- LCE
- Landing Craft Emergency - Repair
- LCF
- Levant Coast Flotilla
- LCF(L)
- Landing Craft, Flak (Large)
- LCG(M)
- Landing Craft Gun (Medium)
- LCG(T)
- Landing Craft Gun (Tower)
- LCH
- Land Craft Headquarters
- LCI(L)
- Landing Craft Infantry (Large)
- LCI(L)
- Landing Craft Infantry (Large) (U.S.)
- LCI(S)
- Landing Craft Infantry (Small)
- LCk
- Leading Cook
- LCM
- Landing Craft Mechanized
- LCM(1)
- Landing Craft Mechanised (Mark I)
- LCM(2)
- Landing Craft Mechanised (Mark 2) (U.S.)
- LCM(3)
- Landing Craft Mechanised (Mark 3) (U.S.)
- LCM(W)
- Landing Craft Mechanized (wood)
- LCMB
- Landing Craft Maintenance Base
- LCMSD
- Landing Craft Material Supply Depot
- LCMSO
- Landing Craft Maintenance Stores Officer
- LCN
- Landing Craft Navigational (U.S.)
- LCOCU
- Landing Craft Obstruction Clearance Unit
- LCP(2)
- Landing Craft Personnel (Mark II)
- LCP(L)
- Landing Craft Personnel (Large)
- LCP(L)
- Landing Craft Personnel (Large) (U.S.)
- LCP(M)
- Landing Craft Personnel (Medium) (U.S.)
- LCP(R)
- Landing Craft Personnel (Ramped) (U.S)
- LCP(S)
- Landing Craft Personnel (Small) (U.S.)
- LCPL
- Lance Corporal
- LCr
- Lieutenant Commander
- LCR(L)
- Landing Craft Rubber (Large)
- LCR(S)
- Landing Craft Rubber (Small)
- LCS(L)
- Landing Craft Support (Large) (U.S.)
- LCS(M)(3)
- Landing Craft Support (Medium, Mark III) (U.S.)
- LCS(S)
- Landing Craft Support (Small) (U.S.)
- LCT
- Landing Craft Tanks
- LCT(1)
- Landing Craft Tank (Mark I)
- LCT(2)
- Landing Craft Tank (Mark II) (U.S.)
- LCT(3)
- Landing Craft Tank (Mark III) (U.S.)
- LCT(4)
- Landing Craft Tank (Mark IV) (U.S.)
- LCT(5)
- Landing Craft Tank (V) (U.S.)
- LCT(R)
- Landing Craft Tank (Rocket)
- LCV
- Landing Craft Vehicle (U.S.)
- LCV(2)
- Landing Craft Vehicle (Mark II)
- LCV(P)
- Landing Craft Vehicle (Personnel)
- Ldng
- Leading
- LDRCAPC
- Lancaster Detachment Royal Canadian Army Pay Corps
- LDS
- Latter Day Saint Church
- LeicR
- Leicestershire Regiment
- LeicYeo
- Leicestershire Yeomanry
- LeinsR
- Leinster Regiment
- LEME
- Land Electrical and Mechanical Engineering
- LER
- Royal Edmonton Regiment
- LF
- Leave & Furlough
- LF de MR
- Les Fusiliers de Mont Royal (French only)
- LFA
- Régiment de Lévis
- LFA
- Le Régiment de Chateauguay
- LFAA
- Le Régiment de Hull
- LFC
- Les Voltigeurs de Québec
- LFCA
- Land Force Central Area (Toronto)
- LFDTS
- Land Forces Doctrine and Training System
- LFMHRCAMC
- Lesters Field Military Hospital, Royal Canadian Army Medical Corps
- LFQA
- Land Force Quebec Area
- LFRR
- Land Force Reserve Restructure
- LFWA
- Land Force Western Area (Edmonton)
- LG
- Lethbridge Garrison
- LG
- Lewis Gun
- LG
- London Gazette - official British government publication of decorations, honours and promotions
- LGC
- Landing Craft Control
- LGDS
- Life Guards
- LH
- Local Headquarters
- LI
- Light Infantry
- Lieut
- Lieutenant
- LIJIT
- Leader in Job Instruction Training
- LincR
- Lincolnshire Regiment
- LincYeo
- Lincolnshire Yeomanry
- litho
- Lithographic(al)
- LItoCSGHQEAGp
- (Legal) Increment to Canadian Section General Headquarters, Echelon Army Group
- LL
- Denotes that a ship is fitted for magnetic minesweeping
- LLEandLLV
- Landing Lighters
- LLV
- Loop Laying Vessel
- LMB
- Light Mortar Battery - front line unit of light mortars used for direct fire support
- LMG
- Light Machine-Gun
- LMHRCAMC
- Lauzon Military Hospital, Royal Canadian Army Medical Corps
- LMHRCAMC
- Lethbridge Military Hospital, Royal Canadian Army Medical Corps
- LMHRCAMC
- Lewisporte Military Hospital, Royal Canadian Army Medical Corps
- LMHRCAMC
- London Military Hospital, Royal Canadian Army Medical Corps
- LMHRCAMC
- Longueuil Military Hospital, Royal Canadian Army Medical Corps
- LMS
- London, Midland and Scottish (Railway)
- LMU
- Landline Maintenance Units
- LN
- Quebec-Labrador convoy
- LNER
- London and North-Eastern Railway
- LNLanR
- Loyal North Lancashire Regiment
- LNNo
- List of Navy Numbers
- LOAC
- Law of Armed Conflict
- LOCO
- Liaison Officers, Combined Operations
- LofC
- Line(s) of Communication
- LofCFSPS
- Line of Communication Field Security Police Station
- LofCPSCPC
- Line of Communication Provost Section C. Provost Corps
- LofCS(P)CGRU
- Line of Communication Section (Provost) Canadian General Reinforcement Unit
- LofCSRCCS
- Line of Communication Signals, Royal Canadian Corps of Signals
- LofCTrpsSerIncr
- Line of Communication Troops Service Increment
- LondR
- London Regiment
- LonGaz
- London Gazette - official British government publication of decorations, honours and promotions
- LONN
- Liaison Officer Norwegian Navy
- Loth&BordH
- Lothian and Border Horse
- LOU
- Localization of Units
- LP
- Listening Post
- LPC
- Last Pay Certificate
- LPF
- Last Post Fund
- LPhoto
- Leading Photographer
- LPODRCOC
- Longue Pointe Ordnance Depot, Royal Canadian Ordnance Corps
- LPtlmn
- Leading Patrolman
- LR
- Régiment de Lévis (French only)
- LR
- Layer Rating
- LR
- Layer Ratings
- LRAM
- Licentiate, Royal Academy of Music
- LRdeC
- Le Régiment de Chateauguay (French only)
- LRdeH
- Le Régiment de Hull (French only)
- LS
- Leading Seaman
- LS
- Landing Ships
- LS(CASF)
- Lorne Scots (Peel, Dufferin & Halton Regiment), Canadian Active Service Force
- LS(Postal)
- Leading Seaman (Postal)
- LS(R)
- Leading Seaman (Regulating)
- LS(Records)
- Localization Section (Records)
- LSA
- Leading Stores Assistant
- LSA
- Leading Supply Assistant
- LSBA
- Leading Sick Berth Attendant
- LSC
- Landing Ship, Carrier (Derrick-hoisting)
- LSCTC
- Light Scout Car Training Centre
- LSD
- Landing Ship, Dock (U.S.)
- LSE
- Landing Ship, Emergency Repair
- LSgt
- Lance Sergeant
- LSH
- Lord Strathcona's Horse (Royal Canadians) - cavalry unit first established for the South African War
- LSI
- Landing Ship, Infantry
- LSig
- Leading Signalman
- LSjt
- Lance Sergeant
- LST
- Landing Ship, Tank
- LSto
- Leading Stoker
- LSto(FF)
- Leading Stoker (Fire Fighter)
- LStwd
- Leading Stewart
- LSVW
- Light Support Vehicle Wheeled
- Lt
- Light
- Lt
- Lieutenant
- Lt INF
- Lieutenant Infirmiere
- LtCdr
- Lieutenant Commander
- Lt-Col
- Lieutenant-Colonel
- Ltech
- Electronic Technician (Sea)
- LTel
- Leading Telegraphist
- LTO
- Leading Torpedoman
- LVoltdeQ
- Les Voltigeurs de Québec (French only)
- LVT
- Landing Vehicle, Tracked
- LWCA (TC)
- 'L'' Wing Canadian Army (Training Centre)
- LWOP
- Leave Without Pay and Allowances
- LWP
- Leave With Pay
- LWtr
- Leading Writer
- LZ
- London Division
Military abbreviations used in service files starting with M
- M
- Matron
- M
- Miscellaneous
- M
- Major
- M
- Minister, National Defence
- M
- Minelayer
- M & D
- Medals and Decorations
- M & S
- Munitions and Supply
- M&D
- Medals & Decorations - list of theatre medals or decorations received for military service, as well as special citations
- M&D
- Medicine and Return to Duty
- M&JWS
- Mountain & Jungle Warfare School
- M&Wasst
- Munitions and Weapons Assistant
- M&Wtech
- Munitions and Weapons Technician
- M(N)
- Minister for Naval Services
- M(No)
- Captain "M" (Number) Mine Laying Squadron
- M/A
- Meal Allowance
- M/F
- Medium Frequency
- m/n
- Marginally Named
- M/S
- Minesweeper(s)
- M/SAux
- Minesweepers Auxiliary
- M/SBan
- Minesweepers Bangor
- M/SBas
- Minesweepers Bassett
- M/SMotor
- Minesweepers Motor
- M/SWood
- Minesweepers Wooden
- M/T
- Motor Transport
- M1
- Army Service Corps, Mechanical Transport Section
- M2
- Army Service Corps, Electricians
- MA
- Meal Allowance
- MA
- Medical Assistant
- MA
- Master
- MA/SBI
- Motor Torpedo Boat fitted with asdic set and depth charges
- MA/STU
- Mobile Asdic Training Unit
- MAA
- Medium Anti Aircraft (Royal Canadian Artillery)
- MAA
- Master at Arms
- MAAF
- Mediterranean Allied Air Forces
- MAC
- Motor Ambulance Convoy
- MAC
- Minesweeping Craft
- MAC
- Merchant Aircraft Carriers
- MAC
- Merchant-Ship Aircraft Carrier
- MAC
- Minesweeping Attendant
- MAC
- Motor Ambulance Car or Convoy
- Mach
- Machinist
- MachAccOp
- Machine Accounting Operator
- MACR(A)D
- (Manitoba) Armoured Car Regiment (Armoured) Division
- MACRCAMC
- Motor Ambulance Convoy, Royal Canadian Army Medical Corps
- MACRI
- Maritime Atlantic Coastal Routing Instructions
- MAD
- Magnetic Air Detector
- mag
- Magazine
- Mag
- Magnetic
- MAGU
- Master Gunner
- maint
- Maintain, maintained or maintenance
- Maj
- Major
- Maj-Gen
- Major-General
- MAMS
- Mobile Air Movement Section
- Man
- Manitoba
- ManchR
- Manchester Regiment
- MANSR
- Miramichi Area North Shore Regiment
- MAO
- Medical Associate
- MARCOM
- Maritime Command
- MARE
- Maritime Engineering
- MarEngT
- Marine Engineering Technician
- MARI
- Mercantile Atlantic Routing Instructions
- MARS
- Maritime Surface and Sub-surface
- MARURCOC
- Mobile Ammunition Repair Unit, Royal Canadian Ordnance Corps
- MATP
- Mobilization Assignment Training Plan
- MB
- Motorboat
- MB
- Medal of Bravery
- MB
- Military Band
- MB(EGB)
- Military Band (Esquimalt Garrison Band)
- MB(M)
- Motordrome Barracks (Montreal)
- MBC
- Motorboat Crewman
- MBE
- Member of the Order of the British Empire
- MBE
- Order of the British Empire (Member)
- MBLRCAMC
- Mobile Bacteriological Laboratory, Royal Canadian Army Medical Corps
- MBM1
- Soldiers Pay Book
- MBRCA
- Medium Battery, Royal Canadian Artillery
- MBSSM
- Medical Board Sault St. Marie
- MBTC
- Mines Booby Traps Course
- MBURCOC
- Mobile Bath Unit, Royal Canadian Ordnance Corps
- MC
- Military Cross - award given to officers for specific act(s) of bravery, or for meritorious service
- MC
- Memorial Cross
- MC
- Mobile Canteen
- MC
- Motorcycle
- MC
- Motorcycle Course
- MC of S
- Military College of Science
- MC(I)
- Mule Convoy (India)
- Mc/s
- Megacycles per second
- MCC
- Military Career Counsellor
- MCD
- Manager Constructive Dept.
- MCDV
- Maritime Coastal Defence Vessel
- MCH
- Malton Convalescent Hospital
- MCI
- Mercantile Convoy Instructions
- MCMHRCAMC
- Maple Creek Military Hospital, Royal Canadian Army Medical Corps
- MCMHRCAMC
- Macdonald College Military Hospital, Royal Canadian Army Medical Corps
- MCRCAMC
- Medical Centre, Royal Canadian Army Medical Corps
- MCS(C)
- Movement Control Staff (Canada)
- MCS(C)
- Motor Landing Craft Carrying Ship
- MCSP
- Maintenance
- MD
- Manning Depot
- MD
- Military Depot - designated military administrative areas in Canada (13 in number)
- MD
- Military District - (or Depot) designated military administrative areas in Canada (13 in number)
- MD#5&CCVC
- Military District #5 & Camp Commander Valcartier Camp
- MD1
- Military District 1 Western Ontario (London)
- MD11
- Military District 11 British Columbia (Victoria)
- MD12
- Military District 12 Saskatchewan (Regina)
- MD13
- Military District 13 Alberta (Calgary)
- MD2
- Military District 2 Central Ontario (Toronto)
- MD3
- Military District 3 Eastern Ontario (Kingston)
- MD4
- Military District 4 Western Quebec (Montreal)
- MD5
- Military District 5 Eastern Quebec (Quebec)
- MD6
- Military District 6 Maritime Provinces (Halifax)
- MDB
- Military Detention Barracks
- MDBBO
- Military Detention Barracks Brampton, Ontario
- MDBSBCPC
- Military Detention Barracks Stanley Barracks Canadian Provost Corps
- MDC
- Mobile Deperming Craft
- MDG
- Medical Director-General
- Md'Hon
- Médaille d'Honneur (France)
- MDHQS
- Military District Headquarters Staff
- MDS
- Main Dressing Station
- MDU
- Mobile Deperming Unit
- MEAC
- Military Engineers Association of Canada
- Mech
- Director of Mechanization
- Mech
- Mechanic, mechanical or machanized
- MechEqpt(Pk)(Coy)
- Mechanical Equipment (Park) (Company)
- MechTpr
- Mechanical Transport
- med
- Medical
- med
- Medium
- Med
- Mediterranean
- MED
- Manager Engineering Dept. or Mediterranean and Red Sea Area
- MedA
- Medical Assistant
- MedBd
- Medical Board
- MedCTR
- Medical Centre
- Med-Evac
- Medical Evacuation
- Meds
- Director General of Medical Services
- MEF
- Mediterranean Expeditionary Force
- MEF
- Mesopotamian Expeditionary Force
- MEIRI
- Mercantile East Indies Routing Instructions
- MEO
- Mercantile Equipment Office (Naval)
- MESPSRCE
- Mechanical Equipment Spare Parts Section, Royal Canadian Engineers
- MESRCECMF
- Mechanical Equipment Section, Royal Canadian Engineers, Central Mediterranean Force
- MESupt
- Mobile Equipment Superintendent
- MET
- Meteorology or meteorological
- METech
- Mobile Equipment Technician
- MetO
- Meteorological Observer
- MetTech
- Meteorological Technician
- MEXE
- Mechanical Equipment Experimental Establishment
- MF
- Mediterranean Fleet
- MFA
- Mercantile Fleet Auxiliary
- MFB
- Master File Maintenance
- MFB1444
- Re/Engagement Form - Non-Permanent Active Militia
- MFB1481
- Absentees and Deserters - Transportation particulars
- MFB1482
- Absentees and Deserters - Incidental Expense Statement
- MFB227
- Medical History of an Invalid
- MFB235
- Attestation Paper - Permanent Force
- MFB241
- Discharge Certificate - Permanent Force of Canada (Duplicate copy of)
- MFB241a
- Discharge Certificate - Permanent Force of Canada (Duplicate copy of - French)
- MFB241b
- Discharge Certificate of Permanent Force of Canada
- MFB264
- Charge Report
- MFB287
- Appointment to a Commission
- MFB292
- Morning Sick Report
- MFB313a
- Medical Case History Sheet
- MFB313b
- Medical History Sheet - Permanent Force
- MFB350
- Certificate of Discharge - Non-Permanent Active Militia
- MFB375
- Court of Inquiry - Record of Declaration
- MFB465
- Dental History Sheet
- MFB483
- Description of a Deserter
- MFC800
- Individuals Clothing and Equipment statement
- MFD930a
- Last Pay Certificate Canadian Active Service Force
- MFM
- Master File Maintenance
- MFM1
- Officer's Declaration Paper
- MFM1&2b
- Follow Sheet for Master File Maintenance 1 and Master file Maintenance 2
- MFM10
- Form of Will
- MFM103
- Enrolment Form National Resources Mobilization Act of 1940 Personnel
- MFM12
- Certificate of Medical Unfitness
- MFM141
- Certificate of Medical Unfitness national Resources Mobilization Act of 1940
- MFM141
- Index Pay Card (Pay)
- MFM150
- Certificate of Medical Examination, Canadian Women's Army Corps
- MFM153
- Attestation From, Canadian Women's Army Corps
- MFM154
- Canadian Women's Army Corps Discharge Certificate
- MFM16
- Application for Dependent's Allowance (Wife & Child)
- MFM16a
- Application for Dependent's Allowance (Other Supplementary)
- MFM16b
- Application for Dependent's Allowance (Other Dependents)
- MFM16d
- Certificate of Examination (Births, Marriages, Deaths)
- MFM16e
- Canadian Active Service Force Request for Investigation
- MFM16f
- List of Documents (Evidence of Claim)
- MFM16g
- Card Re: Application for Dependent's Allowance
- MFM17
- Assignment of Pay Form (All Ranks)
- MFM18
- Stop Payment Form (Assigned Pay)
- MFM181
- Fingerprint Form
- MFM182
- Identification Form
- MFM18a
- Stop Payment Form (Assigned Pay)
- MFM19
- Changes in Assigned Pay
- MFM2
- Attestation Papers, Other Ranks, English
- MFM216
- Certificate of Apprehension (Absent without leave or Deserter) Canadian Women's Army Corps
- MFM23
- Proceedings on Discharge
- MFM24
- Certificate of Service General Order 139/39
- MFM30
- Records Cards
- MFM30
- X-Ray, Inspection of Chests
- MFM4
- Service and Casualty Form (Part 1)
- MFM55
- Particulars of Family
- MFM55
- Receipt for a Soldier's Documents
- MFM6
- Field Conduct Sheet
- MFM7
- Discharge Certificate - Original - (linen)
- MFM8
- Certificate of Service, Officers and Nursing Sisters
- MFM81
- Proceedings of an Officer or Nursing Sister
- MFM88
- Protection Certificate
- MFM9
- Extension of Service - Permanent Force
- MFM94
- Application for War Service Badge 'General Service Class'
- MFM99
- Voluntary Transfer Form
- MFP
- Military Foot Police
- MFRC
- Military Family Resource Centre
- MFV
- Motor Fishing Vessel
- MFW2463
- Report of Death of a Soldier (Location of grave)
- MFW2570
- Report of Death of a Soldier (Location of grave)
- MG
- Messenger
- MG
- Machine Gun
- MG
- Medical Guard
- MGA
- Major General in charge of Administration
- MGB
- Motor Gun-Boat
- MGC
- Machine Gun Corps
- MGCCav
- Machine Gun Corps Cavalry
- MGCT
- Major-General Combined Training
- MGGS
- Major General, General Staff
- MGHU
- Machine Gun Holding Unit
- MGO
- Master General of the Ordnance
- MGRA
- Major General, Royal Artillery
- MGRU
- Machine Gun Reinforcement Unit
- MGS
- Machine Gun Squadron
- MGTC
- Machine Gun Training Centre
- MGTC(NRMA)
- Machine Gun Training Centre (National Resources Mobilization Act of 1940)
- MGTC(RF)
- Machine Gun Training Centre (Reserve Fleet)
- MH
- Military Hospital
- MHC
- Miscellaneous Harbour Craft
- MHHRCAMC
- Montmagny Military Hospital, Royal Canadian Army Medical Corps
- MHHRCAMC
- Montreal Military Hospital, Royal Canadian Army Medical Corps
- MHHRCAMC
- Mulgrave Military Hospital, Royal Canadian Army Medical Corps
- MHLRCAMC
- Mobile Hygiene Laboratory, Royal Canadian Army Medical Corps
- MIA
- Missing in Action - casualty whose whereabouts and status (alive, dead or captured) after an action are unknown
- MIA
- Mounted Infantry
- MIC
- Medical Instructions Camp
- Mid
- Midshipman
- MID
- Mentioned in Despatches - commendation by commanding officer for outstanding or meritorious service
- Midd'xR
- Middlesex Regiment
- MidR
- Midland Regiment
- Mil
- Military - organization responsible for defending a country or for the conduct of a war
- MILE
- Military Engineering
- MilHos
- Military Hospital
- MilMed
- Military Medal for Good Service (Portugal)
- MILO
- Military Intelligence Liaison Officer
- Min
- Minister
- MIN
- Mine, minecraft (U.S.)
- Min(A)
- Minister for Air
- MIO
- Maritime Interdiction Operations
- MIR
- Medical Inspection Room
- MIS
- Ministry of Information
- MIS
- Mercantile Intelligence Section (Naval)
- Misc
- Miscellaneous
- Miss
- Missing - location of an individual is unknown
- Mit
- Mitrailleuses
- MJ
- Major
- MJGE
- Major General
- ML
- Motor Launch
- ML
- Missing List
- ML&BU
- Mobile Laundry and Bath Unit
- ML&FDU
- Mobile Laundry & Forward Decontamination Unit
- MLB
- Motor Landing Barge (U.S.)
- MLB
- Motor Lifeboat (GG) (U.S.)
- MLC
- Motor Landing Craft
- MLO
- Military Liaison Officer or Military Landing Officer
- MLOC
- Minimum Level of Capability
- MLRU
- Mobile Land Repair Units
- MLV
- Mine Laying Vessels
- MLVW
- Medium Logistics Vehicle Wheeled
- MM
- Motor Mechanic
- MM
- Military Medal - medal for bravery awarded to other ranks (non-officers)
- MM
- Meteorologist's Mate
- MMG
- Motor Machine Gun
- MMG
- Medium Machine Gun
- MMGC
- Motor Machine Gun Corps
- MMHRCAMC
- Magantic Military Hospital, Royal Canadian Army Medical Corps
- MMHRCAMC
- Mewata Military Hospital, Royal Canadian Army Medical Corps
- MMHRCAMC
- Mimico Military Hospital, Royal Canadian Army Medical Corps
- MMHRCAMC
- Monteith Military Hospital, Royal Canadian Army Medical Corps
- Mmil
- Médaille Militaire (France) (French only)
- MML
- Manual of Military Law
- MMM
- Member of the Order of Military Merit
- MMP
- Miscellaneous Military Personnel
- MMP
- Military Mounted Police
- MMPITest
- Minnesota Multiphasic Personality Inventory Test
- MMR
- Manitoba Mounted Rifles
- MMR
- Mercantile Marine Reserve
- MMS
- Mercantile Movements Section (Naval)
- MMS
- Motorcycle Maintenance School
- MMTP
- Military Medical Training Plan
- MMU
- Multi-National Medical Unit
- MNB
- Mobile Naval Base
- MNBDO
- Mobile Naval Base Defence Organization
- MNC
- Merchant Navy Code
- MND
- Minister of National Defence
- MNEU
- Mission Navale Etats Unis, Washington
- MNOPF
- Merchant Navy Officer's Pension Fund
- MNP
- Merchant navy Privilege
- MNS
- Manager of Naval Stores
- Mnvre
- Manoeuvre
- MO
- Medical Officer
- MO
- Meteorological Observer
- MO
- Meteorological Technician
- MO(D)
- Medical Officer (Dental)
- MO(s)
- Militia Order
- Mob
- Mobile or mobilization
- MOB
- Man overboard
- Mobn
- Mobile or mobilization
- MOC
- Military Occupation Code
- MOC
- Military Operation Code
- MOCOMP
- Maintenance of Competency (Physicians Only)
- MOEF
- Mid-Ocean Escort Force
- MOF
- Master of the Fleet
- MofWT
- Ministry of War Transport
- MOG
- Medical Officer of the Guard
- MOMP
- Mid Ocean Meeting Point
- MonmouthR
- Monmouthshire Regiment
- MORT
- Maintenance Officer Rescue Tugs
- MOSID
- Military Occupation Structure Identification Description
- MOTP
- Medical Officer Training Plan
- MOU
- Memorandum of Understanding
- mov
- Movement
- Mov
- Movement Control Staff
- MP
- Memorial Plaque
- MP
- Military Police
- MP
- Military Policeman
- MP
- Muster Parade
- MP&DB
- Main Party
- MP&DB
- Military Prison & Detention Barracks
- MPCC
- Military Police Complaints Commission
- MPCRI
- Mercantile Pacific Coastwise Routeing Instructions
- MPD
- Military Prisons Department
- MPI
- Mean Point of Impact
- MPO
- Moving Picture Operators
- MPRI
- Mercantile Pacific Routeing Instructions
- MPS
- Manning Priority System
- MPSC
- Military Provost Staff Corps
- MPSCAO/S
- Mobile Printing Section Canadian Army Overseas
- MQMS
- Mechanic Quartermaster-Sergeant
- MR
- Master-at-Arms
- MR
- Mounted Rifles
- MR
- Régiment de Maisonneuve (French only)
- MR
- Régiment de Montmagny (French only)
- MR
- Motor Regiment
- MR
- Medium Regiment
- MR
- Midland Regiment
- MR
- Mobilization & Recruiting Section of Organization
- MRC
- Military Research Centre
- MRD
- Moncton Recruiting Depot
- MRD
- Manitoba Regimental Depot - facility behind front used to assemble men and to store and administer equipment and materials
- MRF
- Les Fusiliers de Mont-Royal (French only)
- MRSS
- Medium Regiment Signals Section
- MS
- Minesweeper
- MS
- Motor Ship (U.S.)
- MS
- Medical Staff
- MS
- Military Secretary
- MS
- Master Sergeant
- MS
- Mechanical Specials
- MS(No)
- Senior Officer (Number) Minesweeping Flotilla
- MSA
- Military Service Act (Canada 1917)
- MSB
- Medical Selection Boards
- MSB
- Military Service Branch
- MSC
- Medical Staff Corps
- MSD
- Medical Stores Depot
- MSD
- Munitions & Supply Depot
- MSE
- Mobile Support Equipment
- MSEO
- Mobile Support Equipment Officer
- MSEOP
- Mobile Support Equipment Operator
- MSF(No)
- (Number) Minesweeping Group
- MSFF
- Moroccan Sea Frontier
- MSG(No)
- (Number) Minesweeping Group
- Msgt
- Master Sergeant
- MSLC
- Mount Saint Louis Contingent
- MSLSH
- (Mechanized) Squadron Lord Strathcona's Horse (Royal Canadians)
- MSM
- Meritorious Service Medal
- MSM
- Mechanic Sergeant-Major
- MSRTM
- Marine Superintendent Rescue Tugs Mediterranean
- MSS
- Mechanist Staff Sergeant
- MSSC
- Military Store Staff Corps
- MSTech
- Mechanical Systems Technician
- MStGeo
- Medal of Saint George (Russia)
- MT
- Militia
- MT
- Military
- MT
- Motor Transport
- MT
- Mechanical Transport
- MTAP
- Military Training Assistance Program
- MTB
- Motor Torpedo Boat
- MTC
- Militia Training Centre
- MTC(A&TS)
- Military Training Centre (Administrative & Training Staff)
- MTCDS
- Military Training Centre District School
- MTCRCOC
- Mechanics Training Centre, Royal Canadian Ordnance Corps
- MTCT
- Militia Training Centre Trainees
- Mtd
- Mounted
- MTDGB(B)
- Mechanical Transport Depot Guard Borden (Borden)
- MTDRCOC
- Mechanized Transport Depot, Royal Canadian Ordnance Corps
- MTE
- Mechanical Training Establishment
- Mtech
- Metals Technician
- MTHU
- Mechanical Transport Holding Units
- MTICMHQRCOC
- Mechanical Transport Inspectorate Canadian Military Headquarter, Royal Canadian Ordnance Corps
- MTIRCASC
- Mechanical Transport Inspectorate, Royal Canadian Army Service Corps
- MTIRCEME
- Mechanical Transport Inspectorate, Royal Canadian Electrical and mechanical Engineers
- MtlTech
- Metals Technician
- MTMU
- Mechanical Training Mobile Unit or Mobile Torpedo Maintenance Unit
- Mtn
- Mountain
- MTO
- Motor Transport Officer
- MTO
- Mechanical Transport Officer (Air)
- MTOC
- Maintenance Training Officer Course
- MTOC
- Mechanical Training Officer Course
- MTR
- Mechanical Transport Regiment
- MTS
- Motor Transport Service
- MTSDRCOC
- Mechanical Transport Sub Depot, Royal Canadian Ordnance Corps
- MtStBSC
- Mount St. Bruno Summer Camp (Bruno Training Battalion & Bruno Summer Camp Headquarters)
- MTTSCRCOC
- Mechanical Transport Technical Stores Company, Royal Canadian Ordnance Corps
- MTVRD
- Mechanical Transport Vehicle Reception Depot
- MTW/SSRCOC
- Mechanical Transport Workshop Section, Royal Canadian Ordnance Corps
- MTW/SSRCOC
- Military Training
- MTW/SSRCOC
- Mobilization Training Centre
- MTW/SSRCOC
- Mobilization Training Centre
- MTW/SSRCOC
- Movement Train
- MU
- Medically Unfit
- MU
- Maintenance Unit
- Mus
- Musician
- Mus
- Muslim
- MUSC
- Music
- Muscn
- Musician
- MV
- Master-At-Arms
- MV
- Muzzle Velocity
- MV
- Motor Vehicle
- MVO
- Member of the Royal Victorian Order
- MvtCon
- Movements Controller
- MW
- Maintenance Wing
- MW,SSupt
- Metals Workshops Superintendent
- MWT
- (British) Ministry of War Transport
- MWTelO
- Marine Wireless Telegraph Operator
- MX
- Memorial Cross
Military abbreviations used in service files starting with N
- N
- Navigation
- N/A
- Not applicable
- N/E Unit
- Non-Effective Unit
- N/K
- Not Known
- N/K
- Next of kin
- N/S
- Nursing Sister(s)
- NA
- Naval Attache
- NA
- Naval Aircrewman
- NA(P and P)
- Naval Assistant (Policy and Plans)
- NAAF
- Northwest African Air Force
- NAAFI
- Navy, Army and Air Force Institute
- NAB
- Naval Auxiliary Boats
- NAC
- Naval Accommodation Camp
- NAC
- Naval Assignment Sub-Committee for U.S. Ammunition Pool
- NAC
- New Apostle Church
- NACAF
- North African Air Force
- NACO(I)
- Naval Adviser, Combined Operations (India)
- nad
- No Active Disease
- NAD
- Naval Ammunition Depot
- NAFDU
- Naval Air Fighting Development Unit
- NAGS
- Naval Air Gunners School
- NAMPCB
- Naval Air Maintenance Party China Bay
- NAP
- Normal (sometimes Nieuw) Amsterdams(che) Peil
- NAR
- Naval Air Representative
- NAS
- Naval Air Station
- NASAF
- North African Strategic Air Force
- NASO
- Naval Armament Supply Officer
- NASOL
- Naval Armament Supply Officer, Levant
- NATAF
- Northwest African Tactical Air Force
- NATAF
- North African Tactical Air Force
- NatDef
- National Defence
- NATO
- North Atlantic Treaty Organization
- NATOUSA
- North African Theatre of Operations, U.S. Army
- Nav
- Navigator
- NAVOP
- Naval Operations (U.S.)
- NAY
- Naval Auxiliary Yachts
- NB
- New Brunswick
- NBG
- New Barracks, Gosport
- NBH
- New Brunswick Hussars
- NBMHRCAMC
- North Bay Military Hospital, Royal Canadian Army Medical Corps
- NBO
- Naval Stores Officers
- NBR
- New Brunswick Rangers
- NBR(T)
- New Brunswick Regiment (Tank)
- NBRangers
- New Brunswick Rangers
- NCETF
- Naval Commander Expeditionary Task Force
- NCGroup
- Naval Co-Operation Group
- NCM
- Non-Commissioned Members
- NCNAF
- Naval Commander Northern Attack Force
- NCO
- Non-Commissioned Officer
- NCR
- Naval Central Registry
- NCR(Conf)
- Naval Central Registry (Confidential Section)
- NCS
- Naval Control Service
- NCSI
- Naval Control Service Instructions
- NCSO
- Naval Control Service Officer
- NCXF
- Naval Commander, Expeditionary Force
- NCycBn
- Northern Cyclist Battalion
- NDA
- Naval Distributing Authority
- NDA
- National Defence Act
- NDA
- Naval Discipline Act
- NDCPC
- Newfoundland Detachment "C" Provost Corps
- NDHQ
- National Defence Headquarters
- NDHQC
- National Defence Headquarters Constabulary
- NDHQCCDC
- National Defence Headquarters Company, Canadian Disciplinary Centre OR Canadian Dental Corps
- NDHQCRCASC
- National Defence Headquarters Company, Royal Canadian Army Service Corps
- NDHQCRCOC
- National Defence Headquarters Company, Royal Canadian Ordnance Corps
- NDHQS&SCIntC
- National Defence Headquarters Security & Security Section Canadian Intelligence Corps
- NDHQSRSC
- National Defence Headquarters Section, Royal Canadian Signals
- NDHQTCRCASC
- National Defence Headquarters Transport Company, Royal Canadian Army Service Corps
- NDHQVPE
- National Defence Headquarters Vehicle Proving Establishment
- NDO
- Northern Drafting Officer
- NDOC
- National Defence Operations Centre
- NDOFP
- Non-Divisional Ordnance Field Park, Royal Canadian Ordnance Corps
- N-DOW/SRCOC
- Non-Divisional Ordnance Workshop, Royal Canadian Ordnance Corps
- NEA
- North East Atlantic Area
- NECRI
- Northern Europe Coastal Route Instructions
- NEO
- New Entry Officer
- NEOCDE
- Naval Experiment Officer, Chemical Defence Experimental Section
- N-EP
- Non-Effective Personnel
- NES
- Non-Effective Strength
- NETD
- Non-Effective Transit Depot
- N-ETWB
- Non-Effective Transit Wing Battalion
- NF
- Neutralising Fire
- NFCIEF
- Naval Force Commander, India Experimental Force
- NFORCE
- Nassau, Bahamas (Special Company The Pictou Highlanders)
- NG
- New York-Guantanamo Convoy
- NGCS
- Naval General Call Sign
- NGO
- Non Governmental Organization
- NHR
- Naval Historical Records
- NI(S)
- Naval Instructions to Salaried Consular Officers
- NI(U)
- Naval Instructions to Unsalaried Consular Officers
- NIMHRCAMC
- Neys Internment Camp Military Hospital, Royal Canadian Army Medical Corps
- NInf
- Naval Information Section
- NInf
- Naval Information
- NIrH
- North Irish Horse
- NIS
- National Investigation service
- NJTP
- National Joint Training Plan
- NKB
- Not Kite Balloons
- NL
- Nutrition Laboratories
- NL
- Labrador-Quebec Convoy
- NLO(A)
- Naval Liaison Officer (Australia)
- NLOTs
- Naval Liaison Officers Transports
- NMC
- Nanaimo Military Camp
- NMCJS
- Naval Member Canadian Joint Staff
- NMCS
- Naval Member Canadian Staff
- NMed
- Naval Medical Officer, Naval Headquarters
- NMH
- Newmarket Military Hospital
- NMHRCAMC
- Nanaimo Military Hospital, Royal Canadian Army Medical Corps
- NMHRCAMC
- Neill Military Hospital, Royal Canadian Army Medical Corps
- NMHRCAMC
- Neys Military Hospital, Royal Canadian Army Medical Corps
- NMHRCAMC
- Niagara Military Hospital, Royal Canadian Army Medical Corps
- NMOHSC
- Non-Medical Officers Hygiene Sanitation Course
- NNLO
- Netherlands Naval Liaison Officer
- NNSH
- North Nova Scotia Highlanders
- No
- Number
- NO
- Naval Officer
- No(s)
- Number(s)
- NOB
- Naval Operation Base (U.S.)
- NOBARGEN
- Naval Operating Base, Argentina (U.S.)
- NOBERM
- Naval Operating Base, Bermuda (U.S.)
- NOBGTMO
- Naval Operating Base, Guantanamo (U.S.)
- NOBHALIX
- Naval Operating Base, Halifax (U.S.)
- NOBSYD
- Naval Operating Base, Sydney (U.S.)
- NOBTRIN
- Naval Operating Base, Trinidad (U.S.)
- NOComm
- Naval Orders Committee (Judge Advocate General)
- NOCSO
- Neglecting Obey Camp Standing Orders
- NofK
- Next of Kin
- NOi/c
- Naval Officer-in-Charge
- NOIC
- Naval Officer in charge
- NorfR
- Norfolk Regiment
- NorfYeo
- Norfolk Yeomanry
- NORIB
- Naval Officer's Relatives Information Bureau
- North'dFus
- Northumberland Fusiliers
- North'dYeo
- Northumberland Yeomanry
- North'nR
- Northamptonshire Regiment
- North'nYeo
- Northamptonshire Yeomanry
- Notts&DerbyR
- Nottinghamshire & Derbyshire Regiment (The Sherwood Foresters)
- NOTWT
- Not Wireless Telegraphy
- NP
- Non-permanent
- NPA
- North Pacific Area
- NPAM
- Non-Permanent Active Militia
- NPAMF
- Non-Permanent Active Militia Force
- NPAMTCA&TS
- Non Permanent Active Militia Training Centre Administrative & Training Staff
- NPD
- Naval Purchasing Division
- NPF
- Non Public Funds
- NPM
- Naval Provost Marshal
- NPP
- Non Public Property
- NPR
- Naval Personnel Records
- NPT
- Northern Patrol Trawlers
- NR
- Number (U.S.)
- NRC
- Navigational Raiding Craft
- NRC
- National Research Council
- NRE
- Atheist, Agnostic or no Religion
- NREF
- North Russia Expeditionary Force
- NRMA(of 1940)
- National Resources Mobilization Act of 1940
- NRSSTP
- Naval Reserve Summer Student Training Program
- NS
- Nursing Sister
- NS
- Naval Storesman
- NS
- Norwegian Ship
- NS
- Nova Scotia
- NS(No)
- Naval Service file number
- NSA
- North Sea Area
- NSB
- Naval Servicing Boat
- NSC
- Naval Shore Code
- NSCRCS
- Newfoundland Signal Company, Royal Canadian Signals
- NSDC
- Naval Surplus Disposal Committee
- NSDRCOC
- Nanaimo Sub-Depot, Royal Canadian Ordnance Corps
- NSec
- Naval Secretary
- NSHQ
- Naval Service Headquarters
- NSIS
- Naval Store Issuing Ship
- NSO
- Naval Store(s) Officer
- NSomYeo
- North Somerset Yeomanry
- NSR(NB)
- North Shore (New Brunswick) Regiment
- NSRD
- Nova Scotia Regimental Depot - facility behind front used to assemble men and to store and administer equipment and materials
- NSSC
- National Security Studies Course
- NStaffsR
- North Staffordshire Regiment
- NSTC
- Nova Scotia Technical College
- NStr
- Nursing Sisters
- NSTS(No)
- Naval Services Top Secret file number
- NT&YRS
- Northwest Territories & Yukon Radio System
- NTA(East)(West)
- Northern Transit Area East/West
- NTS
- Naval Transportation Service (U.S.)
- NU
- Nurse
- NUR
- Nursing
- NursA
- Nursing Assistant
- NVAC
- Naval Volunteer Ambulance Corps
- NVT&TS
- Night Vision Training & Testing School
- NWA
- North West Atlantic Area
- NWAAF
- North West African Air Force
- NWAC
- North West Air Command
- NWACF
- North West African Coastal Air Force
- NWB
- New Wellington Barracks
- NWDRCCS
- North West Detachment, Royal Canadian Corps of Signals
- NWE
- North West Echelon
- NWE
- Northwest Europe
- NWHME
- Northwest Highway Maintenance Establishment
- NWHS
- Northwest Highway System
- NWR
- Naval Weekly Report
- NWS1
- Medical Examination and Certificate Form, National Resources Mobilization Act of 1940
- NWT&YRSRCS
- Northwest Territories & Yukon Radio System Royal Canadian Signals
- NX
- Naval Exchange
- NXFRON
- Commander New Zealand Frontier
- NYBOS
- Navy Yard, Boston (U.S.)
- NYD
- Naval Yard (U.S.)
- NYD
- Not Yet Determined - a medical condition not yet diagnosed
- NYD
- Not Yet Diagnosed - a medical condition not yet diagnosed
- NYPEATL
- Navy Yard Pearl Harbour (U.S.)
- NZ
- New Zealand
- NZLO
- New Zealand Liaison Officer
- NZMR
- New Zealand Mounted Rifles
- NZNB
- New Zealand Naval Board
- NZRB
- New Zealand Rifle Brigade
Military abbreviations used in service files starting with O
- O
- Observer
- O
- Operations Branch of the General Staff
- O
- Qualified Naval Observer
- O/
- Ordinary
- O/C
- Officer Commanding
- O/Cdt
- Officer Cadet
- O/S
- Ordinary Seaman
- O/S
- Overseas
- O/SDCCODRCOC
- Overseas Detachment Canadian Camp Ordnance Depot, Royal Canadian Ordnance Corps
- OA
- Ordnance Artificer
- OA,1c(or2c,3c,4c,5c)
- Ordnance Artificer, 1st Class (or 2nd,3rd,4th or 5th Class)
- OAC
- Ontario Agricultural College
- OAC
- Ottawa Area Command
- OAC
- Ordnance Ammunition Company
- OACRCOC
- Ordnance Ammunition Company, Royal Canadian Ordnance Corps
- OACRO
- Ottawa Area Command Routine Orders
- OAMCU
- Overseas Air Movements Control Unit
- OAP
- Observation Amphibian Plane (U.S.)
- OARCE
- Officer Administering, Royal Canadian Engineers
- OBE
- Order of the British Empire
- OBLI
- Oxfordshire & Buckinghamshire Light Infantry
- OBV
- Ocean Boarding Vessel
- OC
- Officer Commanding
- OC
- Officer Cadet
- OC
- Officer of the Order of Canada
- OC
- Officer's Clerk
- OCDP
- Officer Career Development Plan
- OCdr
- Ordinary Coder
- OComm
- Orders Committee
- OCRCRCAMC
- Oakville Casualty Retraining Centre, Royal Canadian army Medical Corps
- OCRN
- Officer Commanding, Royal Navy
- OCT
- Officer Cadet in Training
- OCTP
- Officer Candidate Training Plan
- OCTP
- Officer Cadet Training Plan
- OCTU
- Officers Cadet Training Unit
- OCW
- Officer-in-Charge Works
- OD
- Air Mechanic (Ordnance)
- ODC
- Ordnance Depot Company
- ODSRCOC
- Ordnance Depot Saskatoon, Royal Canadian Ordnance Corps
- ODT
- Office of Defence Transportation
- OEO
- Ordnance Engineer Office
- Off
- Office
- OffcCdt
- Officer Cadet
- Offr
- Officer
- OGp
- Orders Group
- OGS
- Officer General Specification
- OHA
- Osmali Horse Artillery
- OHF
- Occupational History Form
- Oi/c
- Officer of Charge
- OIC
- Osmali Irregular Cavalry
- OIC
- Officer-in-Charge
- OinC
- Order in Council
- OINC
- Officer-in-Charge
- OItoCSGHQEA
- (Ordnance) Increment to Canadian Section General Headquarters Echelon Army Group
- OKH
- Oberkommando des Heeres (Army High Command, Berlin)
- OKW
- Oberkommando der Wehrmacht (Armed Forces High Command)
- OLP
- Observation Landplane (U.S.)
- OM
- Overseas Minister
- OM
- Order of Merit
- OMD
- Ordnance Medical Department
- OMERU
- Ordnance Mechanical Engineers Reinforcement Unit
- OMFC
- Overseas Military Forces of Canada - Canadian cabinet ministry that conducted Canadian military affairs in London, England
- OMHRCAMC
- Orillia Military Hospital, Royal Canadian Army Medical Corps
- OMHRCAMC
- Ottawa Military Hospital, Royal Canadian Army Medical Corps
- OMHRCAMC
- Ozada Military Hospital, Royal Canadian Army Medical Corps
- OMM
- Officer of the Order of Military Merit
- OMO
- Ordnance Mechanical Officer
- ON
- United Kingdom-North America Convoy
- ON
- Official Number
- ONS
- United Kingdom-North America Slow Convoy
- Ont
- Ontario
- OntR
- Ontario Regiment
- OntRgt
- Ontario Regiment
- ONUC
- Organisation des Nations Unies au Congo
- OO
- Ordnance Officer
- OO
- Operation(al) Order
- OOD
- Officer of the Day
- OofPCTintheFAAI
- Office of the Paymaster Canadian Troops in the Field Allied Armies in Italy
- OoftheI-G
- Office of the Inspector-General
- OoftheJAG
- Office of the Judge Advocate General
- OOG
- Officer of the Guard
- OOP
- Officer of Patrol
- OOPE
- Officer in charge Office Practice & Equipment (Naval)
- OOW
- Officer of the Watch
- op
- Operate, operated, operation, operational or operator
- OP
- Observation Post
- OPD
- Other Protestant Denomination
- OPDP
- Officer Professional Development Program
- OpEEqpt
- Operator Engineering Equipment
- OPI
- Office of Primary Interest
- OPME
- Officer Professional Military Education
- OpMME
- Operator Mechanic Mobile Equipment
- OPNAV
- Chief of Naval Operations (U.S.)
- OpRmA
- Operating Room Assistant
- Oprs
- Director of Military Operations & Intelligence
- ops
- operations
- OpSbd
- Operator Switchboard
- OpsO
- Operations Officer
- OpSSE
- Operator (Special Engineering Equipment)
- OPtlmn
- Ordinary Patrolman
- OPV
- Offshore Patrol Vessel
- OQ
- Occupation Qualification
- OR
- Operating Room Assistant
- OR
- Other Rank(s)
- OR
- Orderly
- OR
- Orderly Room
- OR
- Other Rank
- OR
- Ontario Regiment
- OR
- Oxford Rifles
- ORBS
- Overseas Recorded Broadcasting Service
- Ord
- Ordnance
- ORD
- Ordinary Seaman
- Org
- Director of Organization
- ORP
- Polish Ship
- ORS
- Orderly Room Sergeant
- ORS
- Ottawa Routeing Summary
- ORSE
- Orderly Room Sergeant
- OS
- Officers School
- OS
- Ordinary Seaman
- OS
- Overseas - all areas outside the territorial waters of North America
- OS
- Officer's Steward
- OS(Records)
- Observation Section
- OSAB
- Officer's Selection Appraisal Board (O-1 Officers' Training Centre)
- OSAC
- Officer Selection Appraisal Centre
- OSAIRCOC
- Ordnance Stores Accounting Inspectorate, Royal Canadian Ordnance Corps
- OSC
- Ordnance Staff Corps
- OSC
- Ordnance Store Company
- OSCRCOC
- Ordnance Store Company, Royal Canadian Ordnance Corps
- OSig
- Ordinary Signalman
- OSMSCMHQRCOC
- Ordnance Services Mobilization Staff, Canadian Military Headquarters, Royal Canadian Ordnance Corps
- OSQ
- Occupation Specialty Qualification
- OSRD
- Office of Scientific Research and Development
- OSSDRCOC
- Officers Shop Supply Depot, Royal Canadian Ordnance Corps
- OT
- Aruba-Dakar convoy
- OT
- Occupation Transfer
- OTC
- Officers Training Centre
- OTC
- Officer Training Corps
- OTC
- Officer in Tactical Command (U.S.)
- OTC
- Officer Training Candidate
- OTC"R"
- Officers Training Centre "Reserve"
- OTel
- Ordinary Telegraphist
- OTS
- Officers Training School
- OTS
- Operational Training Squadron
- OTU
- Operational Training Unit(s)
- OU
- Official Use
- OW/SCoyRCOC
- Ottawa Workshop Company, Royal Canadian Ordnance Corps
- OW/SRCEME
- Ottawa Workshop, Royal Canadian Electrical and Mechanical Engineers
- OW/SRCOC
- Ordnance Workshop, Royal Canadian Ordnance Corps
- Ox&BucksLI
- Oxfordshire & Buckinghamshire Light Infantry
- OxfYeo
- Oxfordshire Yeomanry
- OXV
- Outer Examination Vessel
Military abbreviations used in service files starting with P
- P
- Pilot
- P
- Qualified Pilot duties
- P&A
- Pay and Allowance
- P&JSURCAMC
- Plastic & Jaw Surgery Unit, Royal Canadian Army Medical Corps
- P&NH
- Department of Pensions & National Health
- P&NH100
- Department of Pensions and National Health Hospital (Cases)
- P&NH102
- X-Ray Report Department of Pensions and National Health
- P&O
- Peninsular and Oriental Steam Navigation Co
- P&RT
- Physical and Recreational
- P&S
- Plaque & Scroll (Memorial) - given to the families of soldiers who died during service
- P/G
- Postagram
- P/L
- Plain Language
- P/L
- Privilege Leave
- P/N
- Phonogram
- P/O
- Pilot Officer
- P/V
- Paravane
- P1
- Petty Officer 1st Class
- P2
- Petty Officer 2nd Class
- PA
- Put away
- PA
- Personal Assistant
- PA
- Physiotherapy Aide
- PA
- Paymaster
- PA
- Panama
- PA
- Prince Albert Volunteers
- PA
- Prophylactic Ablution Centre, Royal Canadian Army Medical Corps
- Pac
- Pacific
- PAC
- Public Archives of Canada
- PADS
- Passive Air Defence Section
- Paff
- Public Affairs
- PAFU
- (Pilot) Advanced Flying Unit
- PAIC
- Persian and Iran Commands
- PALO
- Port Amenities Liaison Officer
- PAM
- Permanent Active Militia
- PAM
- Permanent Active Militia of Canada
- PAMHRCAMC
- Port Arthur Military Hospital, Royal Canadian Army Medical Corps
- PAMHRCAMC
- Prince Albert Military Hospital, Royal Canadian Army Medical Corps
- PandRT
- Physical and Recreational Training Officer
- PAO(I)
- Principal Administrative Officer (India)
- PAPDO(I)
- Plastic Armour Protection Development Officer (India)
- PAPO(I)
- Plastic Armour Protection Officer (India)
- Para
- Parachute
- Para
- Paragraph
- Part II
- Part II Orders
- Part II O
- Part II Orders
- Part II OCAP
- Part II Orders Civil Affairs Pool
- Part II ODHQCAPO
- Part II Orders Defence Headquarters Canadian Army Post Office
- Part II's
- Part II Orders
- Part III OCAD
- Part III Orders Civil Affairs Depot
- Part/Serv
- Particulars of Service
- Pat
- Patrol Boat
- PAT
- Patrol
- PATS
- Pre/aircrew Training Schools
- PAV
- Prince Albert Volunteers
- PAVG
- Prince Albert's Volunteer Guard
- Pay
- Directory of Pay Services
- Paymr(Rank)
- Paymaster (Rank)
- PAYR
- Paymaster
- PB
- Pipe Band
- PB
- Patrol Boat
- PB
- Plumber
- PB
- Pounder Battery
- PBFR
- Patrol Boat Fisherman's Reserve
- PBM
- Principal Beach Master
- PBS
- Prefabricated Bituminous Surfacing
- PBTU
- Port Bn. Training Unit
- PC
- Plane Captain
- PC
- Pacific Command
- PC
- Privy Council
- PC
- Privy Council (Orders)
- PC
- Practical Course
- PC
- Patrol Vessel Submarine Chaser (US)
- PC
- 180 ft. Army Salvage or At Sea Vessel
- PC
- Paymaster Clerk
- PC(RCMP)
- Provost Company (Royal Canadian Mounted Police)
- PC2ndE
- Pacific Command 2nd Echelon
- PCB
- Protected Communications Building
- PCCF
- Progress Captain Coastal Forces
- PCCWACKD
- Platoon Company Canadian Women's Army Corps, Kingston Detachment
- PCET
- Personnel Controller Eastern Theatre
- PCforQMS
- Practical Course for Quarter Master Sergeants
- PCMR
- Pacific Coast Militia Rangers
- PCPT
- Paymaster Captain
- PCRCASC
- Pacific Command, Royal Canadian Army Service Corps
- PCRCASC
- Port Company, Royal Canadian Army Service Corps
- PCS
- Personnel Counsellors School
- PCS
- Pilot Conversation School
- PCSIS
- Pacific Command Security Intelligence Section
- PCT
- Paymaster Canadian Troops
- PCTC
- Provost Corps Training Centre
- PCWTCRCASC
- Pacific Command Water Transport Company, Royal Canadian Army Service Corps
- Pd
- Paid
- PD
- Per Day
- PD
- Professional Development
- PD (No)
- Admiralty Record Office File Number
- PD Coord
- Personnel and Defence Co-ordinator
- PD&Hregt
- Peel, Dufferin & Halton Regiment
- PDC
- Professional Development Council
- PDCPC
- Postal Detachment, Canadian Postal Corps
- PDEV
- Personnel Development (to be issued)
- PDG
- Paymaster Director General
- PDO
- Passive Defence Officer
- PDO
- Port Defence Officer
- pdr
- Pounder
- PDRCAPC
- Petawawa Detachment, Royal Canadian Army Pay Corps
- PDSC
- Permanent Degaussing Specification Centre
- PE
- Permanently Employed
- PE
- Permanent Establishment
- PE&R
- Physical Education and Recreation
- PEARL
- Peal Harbour (U.S.)
- PEI
- Permanently Employed Instructor
- PEI
- Prince Edward Island
- PEIH
- Prince Edward Island Highlanders
- PEILH
- Prince Edward Island Light Horse
- PembrokeYeo
- Pembroke Yeomanry
- PENT
- Pentecostal Church
- PEO
- Principal Engineering Officer
- PER
- Personnel Evaluation Report
- PERI
- Physical Education and Recreation Instructor
- PermBr(s)
- Permanent Bridge(s)
- PERO
- Principal Emergency Repair Officer
- Pers
- Directory of Personnel Services
- pet
- Petrol
- PF
- Permanent Force
- PFLO
- Port Facilities Liaison Officer
- PFO
- Probationary Flight Officer
- PG
- Patrol Vessel, Gunboat (U.S.)
- PG
- Proving Ground
- PG Ftr
- Plumber Gas Fitter
- PGDRCEME
- Proving Ground Detachment, Royal Canadian Electrical and Mechanical Engineers
- PGMHRCAMC
- Prince George Military Hospital, Royal Canadian Army Medical Corps
- ph
- Photograph, Photographer, Photographic
- PH
- Pictou Highlanders
- PHE
- Plastic High Explosive
- Photo
- Photographer
- Photo(N)
- Photo Section (Naval)
- PhtTech
- Photographic Technician
- Physio
- Physiotherapist
- PhysoOTAide
- Physio-Occupations Therapy Aide
- PI
- Plot and Radar Instructor
- PI
- Pioneer
- PIAT
- Projector, Infantry, Anti-Tank
- Pion
- Pioneer
- PISE
- Pioneer Sergeant
- PITB
- Pacific Infantry Training Battalion
- PJBD
- Permanent Joint Board on Defence
- Pk
- Park
- PL
- Platoon
- PL
- Princess Louise Fusiliers (Now 23rd Army Tank Regiment)
- PL
- Privileged leave
- PL(NB)H
- Princess Louise (New Brunswick) Hussars
- Plbr
- Plumber
- PLD
- Post Living Differential
- PLDG
- Princess Louise Dragoon Guards
- PLE
- Prudent Limit of Endurance
- PLFus
- Princess Louise Fusiliers
- PLPMHRCAMC
- Portage La Prairie Military Hospital, Royal Canadian Army Medical Corps
- PLQ
- Primary Leadership Qualification
- Plr
- Plumber
- PLT
- Pilot Officer
- PLY
- Plymouth Division
- PM
- Provost Marshall
- PM
- Polar Medals
- PM
- Paymaster
- PM
- Pharmacist
- PMat
- Principal Matron
- PMatron
- Principal Matron
- PMCCMSC
- Petawawa Military Camp Corps of Military Staff Clerks
- PMCT
- Pay Master Corps Troops
- PMCTDRCAPC
- Paymaster Canadian Troops Detachment Royal Canadian Army Pay Corps
- PMed
- Preventive Medicine
- PMHRCAMC
- Petawawa Military Hospital, Royal Canadian Army Medical Corps
- PMHRCAMC
- Peterboro Military Hospital, Royal Canadian Army Medical Corps
- PML
- Preferred Manning Level
- PMML
- Pilot Model Mobile Laundry
- PMO
- Principal Medical Officer
- PMPS
- Permanent Military Provost Staff
- PMQ
- Permanent Married Quarters
- Pmr
- Paymaster
- PMTO
- Principal Medical Transport Officer
- PN
- Patrol Vessel, Eagles (Eagle Boat) (U.S.)
- PN
- Painter
- PNA
- Polish Naval Attache
- PNLO
- Principal British Naval Liaison Officer to Allied Navies
- Pnr
- Pioneer - member of a pioneer battalion, used for specialized engineering work in rear areas
- Pnr(Bn)
- Pioneer (Battalion)
- PNSO
- Port Minesweeping Officer
- Pntr
- Painter
- PO
- Petty Officer
- PO
- Performance Objective
- PO
- Pilot Officer
- PO
- Portsmouth Division
- PO(Postal)
- Petty Officer (Postal)
- POA
- Pacific Ocean Area
- POCdr
- Petty Officer Coder
- POCk
- Petty Officer Cook
- POE
- Port of Embarkation
- POET
- Performance Oriented Electronic Training
- PofWOR
- Princess of Wales Own Regiment
- PofWR
- Prince of Wales Rangers
- POM
- Petty Officer Mechanic
- POMMD
- Principal Officer Mercantile Marine Depot
- POSM
- Petty Officer Stoker Mechanic
- posn
- Position
- Post
- Base Post Office
- PostClk
- Postal Clerk
- POStwd
- Petty Officer Steward
- POTel
- Petty Officer Telegraphist
- POW
- Prisoner of War
- POWEDCProC
- Prisoner of War Escort Detachment Canadian Provost Corps
- POWtr
- Petty Officer Writer
- PP
- Palestinian Ports
- PP
- Parachutist Pay
- PP
- Princess Pat's (Princess Patricia's Canadian Light Infantry)
- PPAPO(I)
- Port Plastic Armour Protection Officers (India)
- PPCB
- President, Pensions & Claims Board
- PPCLI
- Princess Patricia's Canadian Light Infantry - Canadian regiment of experienced soldiers privately established by Hamilton Galt
- PPO
- Principal Priority Officer
- PPOp
- Power Plant Operator
- PPS
- Priority Point Score
- PQ
- Practical Qualifications
- PQ
- Province of Quebec
- Pr
- Private
- PR
- River Gunboat (U.S.)
- PR
- Physical and Recreational trainer
- PR
- Public Relations
- PR(M)
- Perth Regiment (Motor)
- PRADO
- Port Radar Officer
- PRAHQ
- Prince Rupert Area Headquarters
- PRB
- Performance Review Board
- PRB
- Progress Review Board
- PRC
- Progress Review Committee
- PreOCTUS
- Pre. Officers Cadet Training Unit School
- pres
- Presumed
- Pres
- Presbyterian
- PRES
- Primary Reserve
- Presb
- Presbyterian
- Prev
- Previously
- Print
- Chief of Printing & Stationery
- PrivLeave
- Privileged Leave
- PrivLve
- Privileged leave
- PRLO
- Principal Repair Liaison Officer
- PRMHRCAMC
- Peace River Military Hospital, Royal Canadian Army Medical Corps
- PRMHRCAMC
- Prince Rupert Military Hospital, Royal Canadian Army Medical Corps
- pro
- Provost
- PRO(Officer)
- Director of Public Relations (Army)
- Prob
- Probationer
- Probr
- Probationer
- proc
- Proceeded
- Prov
- Provost Corps
- Prov
- Provisional
- PRTO
- Principal Railway Transport Officer
- PRV
- Patrol Service Central Depot
- PS
- Public Schools
- PS(Army)
- Private Secretary to the Minister (Army)
- PS(N)
- Private Secretary to the Minister (Naval)
- PSA
- Personnel Support Agency
- PSE
- Paymaster Sergeant
- PSER
- Pay Sergeant
- PSF
- Panama Sea Frontier
- PSM
- Platoon Sergeant-Major
- PSM
- Platoon Sergeant Major (Warrant Officer III)
- PSO
- Personnel Selection Officer
- PSOD
- Permanent Staff Organization Duty
- PSP
- Pierced Steel Plank
- PS-S
- Provost Sub-Sections
- PSTO
- Principal Sea Transport Officer
- PSTOME
- Principal Sea Transport Officer, Middle East
- PSVO
- Principal Salvage Officer
- PSWQ
- Platoon Support Weapons Qualifications
- PT
- Physical Training
- PT
- Physical and Recreational Training Instructor
- PT
- Patrol Vessel, Motor Torpedo Boat (U.S.)
- Pt II
- Part II (orders relating to personnel of unit: promotions, courses attended, leave, disciplinary matters, etc)
- Pt II DO
- Part II Daily Orders
- Pt II O
- Part II Order(s) - administrative orders issued by a unit (see DO)
- PTB
- Pacific Training Brigade
- PTC
- Motorboat, Submarine Chaser
- PTCO
- Principal Technical Costs Officer
- Pte
- Private - lowest rank of enlisted soldier
- PTEAM
- Private Ambulance
- PTEBU
- Private Bugler
- PTEDRU
- Private Drummer
- PTEPI
- Private Pioneer
- PTF
- Pacific Task Force
- PTI
- Physical Training Instructor
- Ptlmn
- Patrolman
- Ptn
- Platoon
- PTO
- Part II Order(s)
- PTPRCASC
- Petrol Tanker Platoon, Royal Canadian Army Service Corps
- Ptr
- Painter
- PTS
- Parachute Training School
- PTTRCASCPBF
- Pack Transport Troop, Royal Canadian Army Service Corps, Polar Bear Force
- PTU
- Port Transit Unit
- PUO
- Pyrexia - of unknown origin fever of an undetermined cause
- PW
- Platoon Weapons
- PW
- Pay Writer
- PW
- Photographic Wing
- PW
- Prisoner(s) of War
- PW
- Public Works
- PW/TO
- Port Wireless Telegraphy Officer
- PWDB
- Prisoner of War Detention Barracks
- PWED
- Prisoner of War Information Bureau
- PWIB
- Prisoner of War Escort Detachment
- PWOR
- Princess of Wales Own Regiment
- PWP
- Post War Planning Committee
- PWR
- Prince of Wales Rangers
- PWSS
- Post War Signal Station
- PYc
- Coastal Yacht (U.S.)
Military abbreviations used in service files starting with Q
- Q&R
- Quarters and Rations
- QA
- Quarters Allowance
- QAIMNS
- Queen Alexandra's Imperial Military Nursing Service
- QAIMNSR
- Queen Alexandra's Imperial Military Nursing Special Reserve
- QAPCoy
- Quebec Arsenal Protective Company
- QARNNS
- Queen Alexandra's Royal Naval Nursing Service
- Qbranch
- Quartermaster General's Branch
- QCRCE
- Quarrying Company, Royal Canadian Engineers
- QDM
- Qualified Driver Mechanic
- QF
- Quick Firing
- QGM
- Queen's Gallantry Medal
- QI
- Quartermaster Instructor
- QL
- Qualification Level
- QL
- "Q" List
- QM
- Quartermaster
- QMAAC
- Queen Mary's Army Auxiliary Corps
- QMCPL
- Quartermaster Corporal
- QMCPT
- Quartermaster Captain
- QMessages
- A series of numbered messages giving changes in navigational information due to war conditions
- QMG
- Quartermaster General
- QMHRCAMC
- Quebec Military Hospital, Royal Canadian Army Medical Corps
- Qmr
- Quartermaster
- QMS
- Quartermaster Sergeant
- QMS
- Quarter Master Sergeant (Warrant Officer Class II)
- QMSE
- Quartermaster Sergeant
- QMSI
- Quartermaster Sergeant Instructor
- QOCG
- Queen's Own Rifle Guards
- QOCHofC
- Queen's Own Cameron Highlanders of Canada
- QOHC
- Queen's Own Corps of Guides
- QOL
- Quality of Life
- QOLPMO
- Quality of Life Management Office
- QOLSRB
- Quality of Life Senior Review Board
- QOR
- Queen's Own Rifles of Canada
- QORGlasgowYeo
- Queen's Own Royal Glasgow Yeomanry
- QORofC
- Queen's Own Rifles of Canada
- QOYD
- Queen's Own Yorkshire Dragoons
- QPB
- Queen's Park Barracks Staff
- QPBS
- Queen's Park Barracks
- QPMHRCAMC
- Queen's Park Military Hospital, Royal Canadian Army Medical Corps
- QR
- Quebec Regiment
- QR
- Quarter Ratings
- QR
- Quarters Rate
- QR
- Quarters Rating
- QR
- Queen's Regulations
- QR&O
- Queen's Regulations and Orders
- QRD
- Quebec Regimental Depot - facility in England used to assemble men and to store and administer equipment and materials
- Qrmr
- Quartermaster
- Qr-Mr
- Quartermaster
- QS
- Quebec-Sydney Convoy
- QSM
- Quartermaster Sergeant-Major
- QueensSR
- Queen's Royal West Surrey Regiment
- QYR(1st AR)
- Queen's York Rangers (1st American Regiment)
Military abbreviations used in service files starting with R
- R
- Regiment
- R
- Regimental
- R
- Regular
- R
- Requisitioned
- R
- Reserve
- R
- Royal
- R&A
- Rations and Allowances
- R&D
- Redesignated & Disbanded Units
- R&DU
- Redesignated and Disbanded Units
- R&I
- Repair & Inspection
- R&ISEC
- Research & Information Section
- R&Q
- Rations & Quarters
- R&SofS
- Remission & Suspension of Sentence
- R/A
- Radio Acoustic
- R/R
- Railroad
- R/S/L
- Returned Sailing List
- R/T
- Radio Telephony
- R22eR
- Royal 22e Régiment (Available in french only)
- Ra
- Rations
- RA
- Air Electronic Technician
- RA
- Radio Artificer
- RA
- Radio Technician (Air)
- RA
- Rear Admiral
- RA
- Regiment of Artillery
- RA
- Royal Artillery
- R-A
- Rear-Admiral
- RA 3rd BS
- Rear Admiral Third Battle Squadron
- RA(A)
- Rear Admiral Aircraft Carriers
- RA(M)
- Rear Admiral (Minelayers)
- RA(No)
- Rear Admiral (Number) Battle Squadron
- RA(V)
- Rear Admiral (''V'' Force)
- RA,1c(or2c,3c,4c,5c)
- Radio Artificer, 1st Class (or 2nd,3rd,4th or 5th Class)
- RAAF
- Royal Australian Air Force
- RAC
- Royal Armoured Corps
- RAChD
- Royal Army Chaplain's Department
- RACOB(WA)
- Rear Admiral Combined Operations Base (Western Approaches)
- RAD
- Rear Admiral Destroyers
- RadNav
- Radio Navigator
- RadOp
- Radio Operator
- RadSea
- Radioman (Sea)
- RadTech
- Radio Technician
- RAE
- Radio Equipment Assistant
- RAE
- Royal Aircraft Establishment
- RAEC
- Royal Army Education Corps
- RAECEF
- Rear Admiral Escort Carriers Eastern Fleet
- RAEFAC
- Rear Admiral Eastern Fleet Aircraft Carriers
- RAF
- Royal Air Force British - air force (Royal Flying Corps [RFC] before April 1918)
- RAG
- Rifles Armoury Guards
- Ragr
- Radiographer
- RALSU
- Rear Admiral Landing Ships Unallocated
- RAMC
- Royal Army Medical Corps
- RAMCO
- Royal Army Medical Corps Officers
- RAN
- Royal Australian Navy
- RANAS(IO)
- Rear Admiral Naval Air Stations (Indian Ocean)
- RANVR
- Royal Australian Naval Volunteer Reserve
- RAO
- Royal Artillery Officers
- RAOC
- Royal Army Ordnance Corps
- RAOCO
- Royal Army Ordnance Corps Officers
- RAP
- Regimental Aid Post
- RAPC
- Royal Army Pay Corps
- RASC
- Royal Army Service Corps
- RASpec
- Recreation and Athletic Specialist
- RATE
- Rear Admiral Training Establishments
- RAVC
- Royal Army Veterinary Corps
- RB
- Rifle Brigade
- RB(IC)
- Reconnaissance Battalion (In Canada)
- RBerksR
- Royal Berkshire Regiment
- RC
- Recruiting Centre
- RC
- Release Centre
- RC
- Reselection Centre
- RC
- Roman Catholic
- RC
- Royal Canadians
- RC(IaN)
- Refugee Camp (Ile aux Noix)
- RCA
- Royal Canadian Artillery
- RCA(CD)
- Royal Canadian Artillery (Coast Defence Branch)
- RCAB
- Royal Canadian Artillery Band
- RCAC
- Royal Canadian Armoured Corps
- RCAC
- Royal Canadian Army Cadets
- RCAC(MP)
- Royal Canadian Artillery Camp (Macauley Plains)
- RCACC
- Royal Canadian Army Chaplain Corps
- RCACD
- Royal Canadian Artillery Canadian Division
- RCAF
- Royal Canadian Air Force
- RCAF(Aux)
- Royal Canadian Air Force (Auxiliary)
- RCAF(PR)
- Royal Canadian Air Force (Primary Reserve)
- RCAF(R)
- Royal Canadian Air Force (Regular)
- RCAHWENDHQS
- Royal Canadian Artillery, Home War Establishment, National Defence Headquarters Section
- RCAMC
- Royal Canadien Army Medical Corps
- RCAMCPST
- Royal Canadian Army Medical Corps Plastic Surgery Team
- RCAMCTC
- Royal Canadian Army Medical Corps Training Centre
- RCAMCTC(R)
- Royal Canadian Army Medical Corps Training Centre (Reserve)
- RCanDns
- Royal Canadian Dragoons
- RCanHArt
- Royal Canadian Horse Artillery
- RCanR
- Royal Canadian Regiment
- RCanSigEng
- Royal Canadian Signal Engineers
- RCAPC
- Royal Canadian Army Pay Corps
- RCARU
- Royal Canadian Artillery Reinforcement Unit
- RCASC
- Royal Canadian Army Service Corps
- RCASCB
- Royal Canadian Army Service Corps Band
- RCASC-CASF
- Royal Canadian Army Service Corps - Canadian Active Service Force
- RCASCCF
- Royal Canadian Army Service Corps Company Force
- RCASCG
- Royal Canadian Army Service Corps Group
- RCASCHU
- Royal Canadian Army Service Corps Holding Unit
- RCASCRU
- Royal Canadian Army Service Corps Reinforcement Unit
- RCASCTC
- Royal Canadian Army Service Corps Training Centre
- RCASCTCR
- Royal Canadian Army Service Corps Training Centre Reserve
- RCATC
- Royal Canadian Artillery Training Centre
- RCATC(R)
- Royal Canadian Artillery Training Centre Reserve
- RCC
- Railway Construction Company
- RCC
- Remote Control Officer
- RCCRCE
- Road Construction Company, Royal Canadian Engineers
- RCCS
- Royal Canadian Corps of Signals
- RCCSTC(R)
- Royal Canadian Corps of Signals Training Centre (Reserve)
- RCD
- Royal Canadian Dragoons - heavy cavalry unit
- RCDC
- Royal Canadian Dental Corps
- RCE
- Royal Canadian Engineers
- RCE(NP)
- Royal Canadian Engineers (Non-Permanent Active Militia)
- RCEB
- Royal Canadian Engineers Bands
- RCECO
- Royal Canadian Engineers Corps Orders
- RCEDF
- Royal Canadian Detachment Force
- RCEME
- Royal Canadian Electrical and Mechanical Engineers
- RCESAbyHQ
- Royal Canadian Engineers Section Administered by Headquarters
- RCETC
- Royal Canadian Engineers Training Centre
- RCETC(R)
- Royal Canadian Engineers Training Centre (Reserve)
- RCEWDCMHQ
- Royal Canadian Engineers Works Directorate, Canadian Military Headquarters
- RCFC
- Refresher Course for Officers
- RCFQ
- Refugee Camp Farnham Quebec
- RCHA
- Royal Canadian Horse Artillery - specific regiment of artillery inside the Royal Canadian Artillery
- RCHQ
- Rear Canadian Headquarters
- RCIC
- Royal Canadian Infantry Corps
- RCL
- Royal Canadian Legion
- RCM
- Military Sub-Committee Of the Ministerial Committee on Reconstruction Problems
- RCMP
- Royal Canadian Mounted Police
- RCN
- Royal Canadian Navy
- RCN(R)
- Royal Canadian Navy (Reserve)
- RCNB
- Royal Canadian Naval Barracks
- RCNH
- Royal Canadian Naval Hospital
- RCNMR
- Royal Canadian Naval Monthly Reserve
- RCNR
- Royal Canadian Navy Reserve
- RCNR(FR)
- Royal Canadian Naval Reserve (Fisherman's Reserve)
- RCNVR
- Royal Canadian Naval Volunteer Reserve
- RCOC
- Royal Canadian Ordnance Corps
- RCOCAM
- Royal Canadian Ordnance Corps Army Magazine
- RCOCB
- Royal Canadian Ordnance Corps Band
- RCOCCO
- Royal Canadian Ordnance Corps Orders
- RCOCHU
- Royal Canadian Ordnance Corps Holding Unit
- RCOCMG(MD)P
- Royal Canadian Ordnance Corps Magazine Guard (McGivney Depot) Petawawa
- RCOCTC(R)
- Royal Canadian Ordnance Corps Training Centre (Reserve)
- RCPC
- Royal Canadian Postal Corps
- RCR
- Royal Canadian Regiment - one of the oldest Canadian infantry regiments, founded in 1883
- RCS
- Radar and Communications School
- RCS
- Routing & Convoy Section (Naval)
- RCS
- Royal Canadian Signals
- RCSB
- Royal Canadian Signals Band
- RCSC
- Royal Canadian Sea Cadets
- RCSE
- Royal Canadian Signal Engineers
- RCSigs
- Royal Canadian Corps of Signals
- RCSME
- Royal Canadian School of Military Engineering
- RCSTC
- Royal Canadian Signals Training Centre
- rd
- road
- rd
- round
- RD
- Reception Depot
- RD
- Release Depot
- RD
- Repair Depot
- RD
- Repatriation Depot
- RDBW(RHR)
- Regimental Depot The Black Watch (Royal Highland Regiment) of Canada
- RDC
- Royal Defence Corps
- RdConstCoy
- Road Construction Company
- RdeChat
- Régiment de Chateauguay (Disponible en français seulement)
- RdeChaud
- Régiment de Chaudiere (Disponible en français seulement)
- RdeH
- Régiment de Hull (Disponible en français seulement)
- RdeJol
- Régiment de Joliette (Disponible en français seulement)
- RdeMais
- Régiment de Maisonneuve (Disponible en français seulement)
- RdeMont
- Régiment de Montmagny (Disponible en français seulement)
- RdeStHya
- Régiment de St-Hyacinthe (Disponible en français seulement)
- RDevonYeo
- Royal Devon Yeomanry
- RDF
- Radio Direction Finder (Radar)
- RDF
- Radio Direction Finding
- RDFMU
- Radio Direction Finder Maintenance Units
- RDFO
- Radio Direction Finder Officer (Naval)
- RDFOU
- Radio Direction Finder Operating Unit
- RDFS
- Radio Direction Finder School
- RDIRCASC
- Relief Driver Increment, Royal Canadian Army Service Corps
- RDMHRCAMC
- Red Deer Military Hospital, Royal Canadian Army Medical Corps
- RDOVI
- Reinforcing Draft Overseas, 14th Reinforcement Draft Overseas
- RdrPC(A)
- Radar Performance Checker (Air)
- RdrPC(G)
- Radar Performance Checker (Ground)
- RdrPltr
- Radar Plotter (Sea)
- RdrTec(A)
- Radar Technician (Air)
- RdrTec(G)
- Radar Technician (Ground)
- RdrTech
- Radar Technician
- RDubFus
- Royal Dublin Fusiliers
- RduSag
- Régiment du Saguenay (Disponible en français seulement)
- RE
- Research Establishment
- RE
- Royal Engineers
- RE(CW)
- Research Establishment (Chemical Warfare)
- REA
- Real Estate Advisor
- RECCE
- Reconnaissance or Reconnoitre
- Recom
- Decommissioned
- RECON
- Reconnaissance (U.S.)
- Recruits
- Naval Recruiting Office (Permanent Naval Force)
- REF
- Radio Experimental Flight
- RefTech
- Refinisher Technician
- reg
- Regulate, regulated, regulating or regulation
- Reg
- Regiment / Regimental
- Regt
- Regiment
- Regt
- Regimental
- Rehab
- Rehabilitation
- RE-HC
- Re-Habilitation Course
- reinf
- Reinforcement(s)
- REKentYeo
- Royal East Kent Yeomanry
- rem
- Remained - stayed in an area, or stayed on duty
- REME
- Royal Electrical and Mechanical Engineers
- REMS
- Reserve Equipment Maintenance Satellites
- REMU
- Reserve Equipment Maintenance Units
- Rep
- Repatriated
- Rep Bn
- Replacement Battalion
- Rep Bn
- Representative
- RepatDep
- Repatriation depot
- rept
- reported
- rep't
- reported
- REPT
- Reserve Entry Training Program
- Reptd
- Reported
- RERMC
- Riding Establishment Royal Military College
- Res
- Reserve - force of men remaining behind the lines to reinforce the front lines where needed
- RESO
- Reserve Entry Scheme - Officers
- RETP
- Reserve Entry Training Plan
- Rev
- Reverend
- RF
- Reserve Fleet
- RFA
- Royal Field Artillery
- RFA
- Royal Fleet Auxiliary
- RFB
- Regimental Funds Board
- RFB
- Reported from Base - unit base report about a soldier
- RFC
- Reserve Force Centre
- RFC
- Royal Field Corps
- RFC
- Royal Flying Corps - see RAF
- Rflm
- Rifleman
- Rfm
- Rifleman
- Rfmn
- Rifleman
- Rfn
- Rifleman
- RforCMF
- Reinforcements for Central Mediterranean Force
- RFR
- Royal Fleet Reserve
- RFRA
- Royal Artillery Pre-War Reservist
- rft
- Reinforcement
- RFTP
- Refresher Flying Training Plan
- Rfts
- Reinforcements
- Rfus
- Royal Fusiliers
- RG
- Regulating Petty Officer
- RGA
- Royal Garrison Artillery
- RGR
- Royal Garrison Regiment
- RGSS
- Registrar General of Shipping and Seamen
- Rgt
- Regiment
- RGuernseyLI
- Royal Guernsey Light Infantry
- RHA
- Royal Horse Artillery
- RHC
- Black Watch (Royal Highland Regiment) of Canada
- RHC
- Royal Highlanders of Canada
- RHGDS
- Royal Horse Guards
- RHIGHRS
- Royal Highlanders (The Black Watch)
- RHLI
- Royal Hamilton Light Infantry
- RHN
- Royal Hellenic Navy
- RHofCAN
- Royal Highlanders of Canada
- RHQRCASC
- Reconstituted Headquarters, Royal Canadian Army Service Corps
- RHRofC
- Royal Highland Regiment of Canada
- Rif
- Rifleman
- Rif
- Rifles
- RIFBRIG
- Rifle Brigade
- RIIP
- Reserve Integrated Information Project
- RInnisFus
- Royal Inniskilling Fusiliers
- RIrReg
- Royal Irish Regiment
- RIrRif
- Royal Irish Rifles
- RIsFus
- Royal Irish Fusiliers
- RLancR
- Royal Lancaster Regiment
- RLE
- Radio Location Establishment
- RLHQ
- Rear Link Headquarters
- RLL(UK)
- Rotation Leave List (United Kingdom)
- RLMSRCCS
- Railway Line Maintenance Section, Royal Canadian Corps of Signals
- RLO
- Research Liaison Officer (Naval)
- RLRCAMC
- Research Laboratory, Royal Canadian Army Medical Corps
- RLU
- Radio Location Unit
- rlwy
- railway
- RlwyConst(Op)(Tg)Coy(Gp)
- Railway Construction (Operating) (Telegraph) Company (Group)
- RM
- Air Radio Mechanic
- RM
- Radioman
- RM
- Royal Marines
- RMA
- Royal Marine Artillery
- RMB
- Royal Marine Band
- RMBPD
- Royal Marine Boom Patrol Detachment
- RMBRIG
- Royal Marine Brigade
- RMC
- Royal Military College of Canada
- RME
- Royal Marine Engineers
- RMF
- Royal Munster Fusiliers
- RMFA
- Royal Malta Fencible Artillery
- RMHRCAMC
- Rideau Military Hospital, Royal Canadian Army Medical Corps
- RMHRCAMC
- Rimouski Military Hospital, Royal Canadian Army Medical Corps
- RMi
- Riegelmine
- RMLI
- Royal Marines Light Infantry
- RMO
- Regimental Medical Officer
- RMO
- Royal Marine Office
- RMR
- Rocky Mountain Rangers
- RMR
- Royal Montreal Regiment
- RMSCR
- Royal Marine Support Craft Regiment
- RMSF
- Royal Marine Striking Force
- RMSO
- Royal Marine Signal Office
- RMTC
- Radio Mechanic's Training Centre
- RMTCRCASC
- Reserve Mechanical Transport Company, Royal Canadian Army Service Corps
- RMTech
- Refrigeration and Mechanical Technician
- RMTG
- Royal Marine Training Group
- RN
- Royal Navy
- RNAD
- Royal Navy Armament Depot
- RNARY
- Royal Naval Aircraft Repair Yard
- RNAS
- Royal Naval Air Service
- RNAS
- Royal Naval Air Station
- RNASAAC
- Royal Naval Air Service Anti-Aircraft Corps
- RNB
- Royal Naval Barracks
- RNBTR
- Royal Naval Benevolent Trust Representative
- RNCVR
- Royal Naval Canadian Volunteer Reserve
- RND
- Royal Naval Division
- RNDevonYeo
- Royal North Devon Yeomanry
- RNLO
- Royal Naval Liaison Officer
- RNN
- Royal Netherlands Navy
- RNO
- Resident Naval Officer
- RNO
- Resident Naval Overseer
- RNorN
- Royal Norwegian Navy
- RNPS
- Royal Naval Patrol Service
- RNR
- Royal Naval Reserve
- RNS
- Radio and Navigation School
- RNSC
- Royal Navy Staff College
- RNSR
- Royal Naval Special Reserve
- RNTE
- Royal Naval Training Establishment
- RNTF
- Royal Naval Torpedo Factory
- RNVR
- Royal Naval Volunteer Reserve
- RNWCC
- Royal Naval War Comforts Committee
- RNWL
- Royal Naval War Libraries
- RNWMP
- Royal North-West Mounted Police
- RNZE
- Royal New Zealand Engineers
- RNZN
- Royal New Zealand Navy
- RO
- Records Only
- RO
- Recruiting Office
- RO
- Reinforcement Officer
- RO
- Report Officer
- RO
- Reporting Officer
- RO
- Routine Order
- ROC
- Royal Observer Corps
- ROCA
- Resident Officer Canal Area
- ROCMHQ
- Records Office, Canadian Military Headquarters
- ROE
- Rules of Engagement
- RofP
- Report of Proceedings
- ROGRCE
- Railway Operating Group, Royal Canadian Engineers
- ROLSH(RC)CA(AF)
- Regimental Orders Lord Stratchcona Horse (Royal Canadians) Canadian Army Active Force
- RomRsch
- Communicator Research
- ROp
- Radio Operator
- ROSJD
- Routine Orders St. John's Defences
- ROTP
- Regular Officer Training Plan
- ROTP(CMC)
- Regular Officer Training Plan (at Canadian Military Colleges)
- ROTP(U)
- Regular Officer Training Plan (at Civilian Universities)
- RO''W''F
- Routine Orders ''W'' Force
- RO''Z''F
- Routine Orders ''Z'' Force
- RP
- Radar Plot Rate
- RP
- Radar Plotter
- RP
- Reserve Posting
- RP (Records)
- Reserve Posting (Records)
- RPIGHQ&LofCT
- Rear Party Increment General Headquarters & Line of Communication Troops
- RPO
- Regulating Petty Officer
- RPSD
- Reserve Pacific Support Depot
- RQ&A
- Rations, Quarters and Allowance
- RQM
- Regimental Quartermaster
- RQMS
- Regimental Quartermaster Sergeant
- RR
- Radiographer
- RR
- Railroad
- RR
- Rifle Range
- RRC
- Royal Red Cross
- RRC
- Royal Regiment of Canada
- RRC
- Royal Rifles of Canada
- RRE
- District Recruiting Establishment
- RRegC
- Royal Regiment of Canada
- RRF
- Royal Regiment of Fusiliers
- RRMC
- Royal Roads Military College
- RRR
- Regina Rifle Regiment
- RS
- Recruiting Station
- RS
- Reinforcement Section
- RS
- Reserve Status
- RSCFC
- Reinforcement Section Canadian Forestry Corps
- RScFus
- Royal Scots Fusiliers
- RSCOTS
- Royal Scots (Lothiam Regiment)
- RSHQCFC
- Reinforcement Section Headquarters Canadian Forestry Corps
- RSM
- Regimental Sergeant-Major - senior non-commissioned officer in a regiment
- RSMHRCAMC
- Rectory Street Military Hospital, Royal Canadian Army Medical Corps
- RSO
- Range Safety Officer
- RSS
- Regimental Support Staff
- RSS
- Regular Support Staff
- RSTech
- Radar Systems Technician
- RSTech
- Radioman Special
- Rsu
- Repair & Salvage Unit
- RSussR
- Royal Sussex Regiment
- RT
- Radio Technician
- RT
- Radio Telephony
- RTC
- Returned to Corps - a soldier returning to duty
- RTCRCAR
- Reserve Training Centre, Royal Canadian Artillery Reinforcements
- Rtn
- Return
- Rtns
- Rations
- RTO
- Railway Tranport Officer
- RTO
- Regimental Transport Officer
- RTO
- Research Technical Officer
- RTO
- Return to Owners
- RTOSRCCS
- Railway Telegraph Operating Section, Royal Canadian Corps of Signals
- RTTP
- Reserve Tradesmen Training Plan
- RTU
- Returned to Unit - a soldier returning to a unit following illness, wounds, leave or training
- RU
- Radio Unit
- RU
- Reinforcement Unit
- RUSNO
- Resident U.S. Naval Officer (U.S.)
- RV
- Rendez-vous point on Patrol
- RVHM
- Royal Victoria Hospital Montreal
- RVM
- Royal Victorian Medal
- RW
- Recorded Warning
- RWCHRCAMC
- Roman Way Convalescent Hospital, Royal Canadian Army Medical Corps
- RWCRCE
- Railway Workshop Company, Royal Canadian Engineers
- RWFus
- Royal Welsh Fusiliers
- RWING
- Reinforcement Wing
- RWKentR
- Royal West Kent Regiment
- RWpgR
- Royal Winnipeg Rifles
- RWPU
- Radio Wave Propagation Unit
- RWR
- Royal Winnipeg Rifles
- RX
- Army Remount Section, Army Service Corps Number Prefix
- Ry
- Railway
- RYM
- Royal Yugoslav
- RYPA
- Roll, Yaw, Pitch and Alter Course
Military abbreviations used in service files starting with S
- S
- Supply
- S&AH
- Southerland & Argyll Highlanders
- S&CD
- Sydney & Canso Defences
- S&LP
- Syrian & Lebanese Ports
- S&PRCASC
- Stationary & Printing, Royal Canadian Army Service Corps
- S&TC
- Supply and Transport Corps
- S&TDRCASC
- Supply & Transport Details, Royal Canadian Army Service Corps
- S(Prob)
- Signalman (Probationer)
- S/
- Staff
- S/D
- Submarine Detector
- S/L
- Sailing List
- S/L
- Squadron Leader
- S/Lieut
- Second Lieutenant
- S/M
- Sergeant Major
- S/M
- Submarine
- S/P
- Signalling Projector
- S/QMS
- Staff Quartermaster-Sergeant
- S/S
- Sound Signalling
- S/Sgt
- Staff Sergeant
- S/Sjt
- Staff Sergeant
- S/T
- Sonic Telegraphy
- SA
- Salvation Army
- SA
- South Atlantic
- SA
- Staff Adjutant
- SA
- Supply Assistant
- SA
- Stores Assistant
- SA
- South Africa
- SA
- Subsistence Allowance
- SA
- Small Arms
- SA/S
- Superintendent, Anti-submarine
- SAA
- Small Arms Ammunition
- SAABRCA
- Section Anti-Aircraft Battery, Royal Canadian Artillery
- SAALO
- Senior Anti-Aircraft Ack Liaison Officer
- SAAMS/LTRCA
- Special Anti-Aircraft Mobile Search Light Troop, Royal Canadian Artillery
- SAB
- Stores Audit Branch
- SAC
- Soldier Aid Commission (Department of Veterans Affairs)
- SAC
- South African Constabulary
- SACOW/SRCOC
- Section Armoured Corps Ordnance Workshop, Royal Canadian Ordnance Corps
- SACSEA
- Supreme Allied Commander, South-East Asia
- SADS
- Squadron Armoured Division Signals
- SAE
- School of Aeronautical Engineering
- SAE
- Senior Assistant Engineer
- SAEC
- South African Engineer Corps
- SAIRCEME
- Small Arms Inspectorate, Royal Canadian Electrical and Mechanical Engineers
- SAIRgt
- South African Irish Regiment
- SAirSO
- Station Air Services Officer
- SAM
- School of Aircraft Maintenance
- SAM
- School of Aviation Medicine
- SAMH
- Ste. Anne's Military Hospital
- San
- Sanitary
- San
- Sanitation
- SANLC
- South African Native Labour Corps
- SanSec
- Sanitary Section
- SAO
- Senior Accountant Officer
- SAO
- Squadron Accountant Officer
- SAO
- Staff Accountant
- SAOI
- Semi-Annual Ordnance Inspection
- SAP
- Soldier Apprentice Plan
- SAR
- School of Aircraft Recognition
- SAR
- South Albert Regiment
- SAS
- Superintendent Anti-Submarine (Naval)
- Sask
- Saskatchewan
- SASO
- Superintendent Armament Supply Officer
- SASS
- Special Air Service Regiment
- SAT
- Superintendent of British Air Training
- SAV
- Staff Assistance Visit
- SB
- Signal Boatswain
- SB
- Special Branch
- SB
- Stockbrokers' Battalion (10th Battalion Royal Fusiliers)
- SB
- Stretcher Bearer
- SBA
- Sick Berth Attendant
- SBA(Prob)
- Sick Berth Attendant (Probationer)
- SBCPO
- Sick Berth Chief Petty Officer
- SBD
- Superintendent Boom Defence
- SBD
- Superintendent of Boom Defence
- SBG
- Small Box Girder
- SBL
- Static Base Laundry
- SBLRCOC
- Static Base Laundry, Royal Canadian Ordnance Corps
- SBNO
- Senior British Naval Officer
- SBPC
- Senior British Naval Officer
- SBPO
- Sick Berth Petty Officer
- SBRCA
- Searchlight Battery, Royal Canadian Artillery
- SBS
- Sick Berth Steward
- SC
- Seaforth Camp
- SC
- Service Chevrons
- SC
- Ship's Circulation or Senior Constructor
- SC
- New York (Halifax, Sydney) to United Kingdom Convoy
- SC
- Scout
- SC
- Star of Courage
- SCAEF
- Supreme Commander Allied Expeditionary Force
- SCAP
- Supreme Commander for the Allied Powers
- SCC
- Surrey County Council
- SCCRCOC
- Salvage Collecting Centre, Royal Canadian Ordnance Corps
- SCES
- Special Construction Equipment Section
- SCFO(O)
- Senior Canadian Flag Officer (Overseas)
- Schnr
- Schooner
- SCHRCAMC
- Sarcee Camp Hospital, Royal Canadian Army Medical Corps
- SchuMi
- Schutzenmine
- SCI
- Staff Corps Indian
- SCL
- Superintendent of Construction Liaison
- SCNO
- Senior Canadian Naval Officer
- SCNO(L)
- Senior Canadian Naval Officer (London)
- SCONDVA
- Standing Committee on National Defence and Veterans Affairs
- SCORif
- Scottish Rifles (Cameronians)
- SCPO
- Stoker Chief Petty Officer
- SCRR
- Special Commission on the Restructuring of the Reserves
- SCS
- Ship's Conducting Staff
- SCTW
- Special Concession Transport Warrant
- SCWO
- School Chief Warrant Officer
- SD
- Strength Decrease
- SD&GH
- Stormont, Dundas & Glengarry Highlanders
- SD&T
- Staff Duties and Training
- SD(Schedules)
- Supplementary Demand / Distribution (Schedules)
- SD(W)
- Staff Duties (Weapons)
- SDandT
- Staff Duties and Training
- SDC
- Secretary of Defence Council
- SDC
- Shipyard Development Committee
- SDCCS
- Special Detachment Canadian Corps Signals
- SDCPC
- Special Detachment Canadian Provost Corps
- SDCWAC
- Special Detachment, Canadian Women's Army Corps
- SDDDToronto
- Special District Distributing Depot
- SDDS(ET)
- Senior Deputy Director of Stores (Eastern Theatre)
- SDDSRCCS
- Sussex Detachment Division Signals, Royal Canadian Corps of Signals
- SDDT
- Special Distributing Depot, Toronto
- SDI
- Submarine Detector Instructor
- Sdn
- Squadron
- SDO
- Signal Distributing Office
- SDO
- Signal District Office (Naval)
- S-DPCRCASC
- Sub-Depot Pacific Command, Royal Canadian Army Service Corps
- S-DRCASC
- Sub-Depot, Royal Canadian Army Service Corps
- SDRCE
- Stores Depot, Royal Canadian Engineers
- SDSRCCS
- Section Division Signals, Royal Canadian Corps of Signals
- SE
- Servicing Echelon
- SE
- Safety Equipment Mechanic
- SE
- Sergeant
- SEA
- Senior Executive-Assistant to the Minister
- SEA
- South East Atlantic Area
- SEAACHQ
- South East Asia Air Command Headquarters
- SEAC
- South East Asia Command
- SEAFOG
- South East Asia Fighter Operations Graticule System
- Seaforth
- Seaforth Highlanders
- SeaforthofCanada
- Seaforth Highlanders of Canada
- SeaHighrs
- Seaforth Highlanders
- Sec
- Secretary to a Flag Officer
- Sec
- Second
- Sec
- Secretary
- Sec
- Section
- SEC
- Security
- SEC
- Special Employment Company
- Secd
- Seconded
- SECNAV
- Secretary of the Navy (U.S.)
- SecNB
- Secretary, Naval Board
- SecNB
- Secretary, Naval Officer
- SecNP
- Secretary, Naval Personnel
- SECO
- South Eastern Command (United Kingdom)
- SecOB
- Secretary Ordnance Board
- SECPC
- Special Employment Company Pacific Command
- Secy
- Secretary, National Defence
- SED
- Superintendent Equipment Division
- SEE
- Superintendent Electrical Engineer
- SEF
- Salary Equalization Factor
- SEF
- Siberian Expeditionary Force - small international force sent to Russia in 1918 to help anti-communist forces
- SEHU
- Surplus Equipment Holding Units
- SEIN
- Sergeant Instructor
- SELT
- Sergeant Lieutenant
- SEng
- Stationary Engineer
- SEO
- Squadron Engineer Officer
- SEO
- Senior Engineer Officer
- SEO(CO)
- Senior Engineer Officer (Combined Operations)
- SEP
- Special Employment Platoon
- SEPA
- South East Pacific Area
- SEPI
- Sergeant Pioneer
- Sergt
- Sergeant
- Serial5000
- Miscellaneous Personnel Overseas - No.1 General Reinforcement Unit
- Serjt
- Sergeant
- SERSupt
- Safety Equipment and Aircraft Refinishing Superintendent
- SETech
- Safety Equipment Technician
- SETRU
- Sergeant Trumpeter
- SFC
- School of Fighter Control
- SFFS
- Ships Fire Fighting School
- SFofC
- Scots Fusiliers of Canada
- SFOR
- Stabilization Force
- SFR
- Sherbrook Fusiliers Regiment
- SFSCFC
- Special Forestry Section Canadian Forestry Corps
- SFTS
- Service Flying Training Schools
- SG
- Sydney-Greenland Convoy
- SG
- Signalman
- SGB
- Steam Gun Boat
- SGds
- Scots Guards
- SGHQCRCASC
- Section General Headquarters Company, Royal Canadian Army Service Corps
- SgL
- Surgeon Lieutenant
- SgLCd
- Surgeon Lieutenant Commander
- Sgmn
- Signalman
- SGO
- Squadron Gunnery Officer
- SGOCRCOC(AD)
- Support Group Ordnance Company, Royal Canadian Ordnance Corps
- Sgr
- Signaler
- Sgt
- Sergeant
- SgtP
- Sergeant Pilot
- SgtPlt
- Sergeant Pilot
- SGW/SRCOC
- Support Group Workshop, Royal Canadian Ordnance Corps
- SH
- Shipwright
- SHA
- Shore Authority Number
- SHAEF
- Supreme Headquarters Allied Expeditionary Force
- SHAPE
- Supreme Headquarters Allied Powers Europe
- SHARP
- Standard for Harassment and Racism Prevention
- SHBRCA
- Super Heavy Battery, Royal Canadian Artillery
- ShCk
- Ship's Cook
- ShCpl
- Ship's Corporal
- SHEAF
- Supreme Headquarters, Allied Expeditionary Force
- SherFor
- Sherwood Foresters
- SherFusR
- Sherbrooke Fusiliers Regiment
- SherRang
- Sherwood Rangers Yeomanry
- SHofC
- Seaforth Highlanders of Canada
- Shpt
- Shipwright
- Shpt,1c(or2c,3c,4c,5c)
- Shipwright, 1st Class (or 2nd,3rd,4th or 5th Class)
- SHR
- St. Hyacinthe Regiment
- ShropsLI
- Shropshire Light Infantry
- ShropsYeo
- Shropshire Yeomanry
- ShrW
- Shrapnel Wound
- SHURCCS
- Signals Holding Unit, Royal Canadian Corps of Signals
- SI
- Strength Increase
- SI
- Special Instruction
- SIC
- Special Infantry Company
- SIDG
- Superintending Inspector of Degaussing
- SIDPHQCRU
- Section "I" Defence Platoon Headquarters Canadian Reinforcement Unit
- Sig
- Signaler
- Sig
- Signalman
- Sig
- Signaling
- Sig(s)
- Signal(s)
- Sigmn
- Signalman or signalmen
- SigSea
- Signalman (Sea)
- SInv
- Security Investigator
- SIOCO
- Senior Intelligence Officer, Combined Operations
- SIR
- Seniority in Rank
- SIrH
- South Irish Horse
- SISCPC
- Special Investigation Section Canadian Provost Corps
- SITC
- Special Infantry Training Centre
- Sitrep
- Situation Report
- SIU
- Special Investigation Unit
- SIV
- Staff Inspection Visits
- SIW
- Self-Inflicted Wound
- SJF(MG)
- St. John Fusiliers (Machine Gun)
- SJMH
- St. Jerome Military Hospital
- SJMHRCAMC
- St. John's Military Hospital, Royal Canadian Army Medical Corps
- SJSMHRCAMC
- Saint James Street Military Hospital, Royal Canadian Army Medical Corps
- Sjt
- Sergeant
- Skr
- Skipper
- SL
- Sailing List
- SL
- Sailmaker
- SLA
- Service Level Agreement
- SLanR
- South Lancashire Regiment
- SLC
- Support Landing Craft
- SLI
- Somerset Light Infantry
- SLI(MG)
- Saskatoon Light Infantry (Machine Gun)
- SLICGRU
- "S" List I Canadian General Reinforcement Unit
- Slmk
- Sailmaker
- SLt
- Sub-Lieutenant
- SLTW
- Special Leave Travel Warrant
- SLU
- Signals Landline Units
- SM
- Stoker Mechanic
- SM
- Sergeant Major
- SMBH
- Standing Medical Board Hamilton
- S-MC
- Sergent-Major De Compagnie (French only)
- SMD
- Superintendent of Mining & Design
- SMEBritUnits
- School of Mechanical Engineers
- SMG
- Sub-Machine Gun
- SMG
- Sergeant-Major
- SMH
- Sorel Military Hospital
- SMHIRCAMC
- Sydney Military Hospital Installation, Royal Canadian Army Medical Corps
- SMHRCAMC
- Saskatoon Military Hospital, Royal Canadian Army Medical Corps
- SMHRCAMC
- Shelburne Military Hospital, Royal Canadian Army Medical Corps
- SMHRCAMC
- Sherbrooke Military Hospital, Royal Canadian Army Medical Corps
- SMHRCAMC
- Simcoe Military Hospital, Royal Canadian Army Medical Corps
- SMHRCAMC
- Suffield Military Hospital, Royal Canadian Army Medical Corps
- SMHRCAMC
- Sussex Military Hospital, Royal Canadian Army Medical Corps
- SMi
- Shrapnel Mine
- SMjr
- Sergeant Major
- Smn
- Seaman
- SMO
- Senior Medical Officer
- SMO(D)
- Squadron Medical Officer (Dental)
- S-MR
- Sergent-Major Regimentaire (French only)
- SMTP
- Special Militia Training Program
- SMTSIDRCOC
- Special Mechanical Transport / Military / Militia or Motor Transport Stores Increment Detachment, Royal Canadian Ordnance Corps
- SN
- Sonarman
- SNAD
- Supt. Naval Armament Depot
- SNCF
- Southern Naval Coastal Frontier
- SNEO(T)
- Senior Naval Experimental Officer (Torpedoes)
- SNLR
- Services No Longer Required
- SNO
- Senior Naval Officer
- SNOAL
- Senior Naval Officer Advanced Landing
- SNOC
- Senior Naval Officer Cyrenaica
- SNOCA
- Senior Naval Officer Casablanca Area
- SNOCON
- Senior Naval Officer Combined Operations North
- SNOCOW
- Senior Naval Officer Combined Operations Isle of Wight
- SNOESy
- Senior Naval Officer, Eastern Sicily
- SNOL
- Senior Naval Officer Landing
- SNOLA
- Senior Laval Officer Landing, Levant Area
- SNOTrip
- Senior Naval Officer Tripolitania
- SNR
- Senior Naval Representative
- SNSO
- Superintending Naval Store Officer
- SO
- Special Operator
- SO
- Signals Officer
- SO
- Staff Officer
- SO
- Senior Officer
- SO
- Standing Orders
- SO(A/AIR)
- Staff Officer for Air Duties
- SO(CO)
- Staff Officer (Combined Operations)
- SO(D)S
- Senior Officer (Dutch Ships)
- SO(I)
- Staff Officer (Intelligence)
- SO(M)
- Staff Officer (Material)
- SO(O)
- Staff Officer (Operations)
- SO(P)
- Staff Officer (Plans)
- SO(T)
- Staff Officer (Trade)
- SO/SM
- Senior Officer, Submarine
- SOACEF
- Senior Officer Aircraft Carriers Eastern Fleet
- S-OBREV1
- Sous-Officier Breveté de 1re Classe
- S-OBREV2
- Sous-Officier Breveté de 2eme Classe
- SOC
- Senior Officers Course
- SOCO
- Signal Officer, Combined Operations
- SOCS
- Staff Officer Control Service (Naval)
- SODS(Air)
- Staff Officer Dental Services (Air)
- SOE
- Special Operation Executive
- SOEATPACFOR
- Commander U.S. South East Pacific Force
- SOEscorts
- Senior Officer Escorts
- SOF(V)
- Senior Office Force (V)
- SofA
- School of Artillery
- SofC
- School of Cookery
- SofS
- Statement of Service
- SOFSC
- Senior Officer Fleet Signal School
- SOH
- Staff Officer / Senior Officer / Signal Officer or Standing Orders Force "H"
- SOI
- Staff Officer - Intelligence
- SOK
- Norwegian Mission, Cockspur St. South West 1
- SOMBB
- Senior Officer Mobile Balloon Barrage
- SOMBB
- Senior Officer Motor Boat Base
- SOME
- Senior Ordnance Mechanical Engineer
- SomLI
- Somerset Light Infantry
- Sonarmn
- Sonarman (Sea)
- SONT
- Senior Officer Northern Trawlers
- SOO
- Staff Officer for Operational Duties
- SOP(A)
- U.S. Naval Senior Officer Present Afloat at (U.S.)
- SOPACFOR
- Commander U.S. Pacific Force
- SOPL
- Staff Officer Polish Liaison
- SORE
- Staff Officer, Royal Engineers
- SORM
- Senior Officer, Royal Marines
- SORS(B)
- Senior Officer Raiding Squadron "B"
- SORS(D)
- Senior Officer Raiding Squadron (Dutchmen)
- SORS(H)
- Senior Officer Raiding Squadron "H"
- SORTF
- Senior Officer Radar Training Flotilla
- SOS
- Send Ordinary Course or Senior Officer Chasseurs
- SOS
- Struck off strength - when a soldier ceases to be a member of a unit because of transfer, injury or death
- SOS1RCOCRU
- Struck Off Strength 1 Reserve or Regiment, Canadian Ordnance Corps Reinforcement Unit
- SOSEF
- Senior Officer Suez Escort Force
- SOSG
- Senior Officer Support Group
- SOTC
- Special Officers Training Centre
- SOTLDF
- Senior Officer Thames Local Defence Flotilla
- SOVMPF
- Senior Officer Vernon Mine Recovery Flotilla
- SoW
- Superintendent of Works
- SOWESTPACFOR
- Commander U.S. South West Pacific Force (U.S.)
- sp
- Support
- SP
- Security Police
- SP
- Signal Publication
- SP
- Special Posting
- SP
- Self-Propelled
- SP
- Shore Patrol
- SP
- Staging Post
- SP
- Sapper
- SPA
- South Pacific Area
- SPB
- Service Police Barracks
- SPBulletin
- Senior Psychologist's (Administration) Bulletin
- SpConst
- Special Constable
- SPCOSA
- Spare Part Control Offices South Africa
- Spec
- Special
- Spec
- Specialist
- SpecInc
- Special Increment
- SPENAVO
- Special Naval Observer, London (U.S.)
- SPNOCD
- Senior Polish Naval Officer, Clyde District
- SPO
- Stoker Petty Officer
- SPO(FF)
- Stoker Petty Officer (Fire Fighter)
- Spr
- Sapper - lowest enlisted rank in Canadian Engineers (see CE)
- SPSRCASC(D)
- Supply Personnel Section, Royal Canadian Army Service Corps (Deffered)
- Spts
- Sportsman
- Spvr
- Supervisor
- SQ
- Sydney-Quebec convoy
- SQ
- Soldier Qualification
- Sqd
- Squadron
- Sqdn
- Squadron
- SQMS
- Squadron Quartermaster-Sergeant
- SQMS
- Staff Quartermaster-Sergeant
- Sqn
- Squadron
- Sr
- Senior
- SR
- Strength Return
- SR
- Supplementary Reserve
- SR
- Special Reserve
- SR
- Scottish Regiment
- SR
- Scottish Rifles (The Cameronians)
- SR&BRCA
- Survey Regiment & Battery, Royal Canadian Artillery
- SRARNAH
- Surgeon Rear Admiral Royal Navy Auxiliary Hospital
- SRBRCA
- Sound Ranging Battery, Royal Canadian Artillery
- SRC
- Signals Refresher Course
- SRD
- Special Radar Detachment
- SRD
- Special Recruiting Detachment
- SRD
- Supply Reserve Depot
- SRE
- Sound Reproduction Equipment
- SRG
- Special Reinforcement Group
- SRItoSRRCA
- Sound Ranging Increment to Survey Regiment, Royal Canadian Artillery
- SRMGD
- Sherbrooke Regiment Machine Gun Depot
- SRNO
- Senior Royal Navy Officer
- SRNO
- Squadron Royal Marine Officer
- SRO
- Squadron Physical and Recreational Training Officer
- SRRCA
- Searchlight Regiment, Royal Canadian Artillery
- SRRCA
- Survey Regiment, Royal Canadian Artillery
- SRRD
- Special Repair Ratings (Dockyard)
- SRS
- Syllabus Regimental Schools
- SRU
- Signal Reinforcement Unit
- ss
- shell shock
- SS
- Sanitary Section
- SS
- Special Service
- SS
- Supply Special
- SS
- Steamship - transport vessel used to carry troops and equipment
- SS
- Submarine (U.S.)
- SS(British)
- Special Service
- SS(German)
- Schutzstaffeln, Nazi party organizations; including elite military units and formations
- SS/T
- Super Sonic Telegraphy
- SSA
- Ship's Steward's Assistant
- SSA
- Short Service Appointment
- SSaskR
- South Saskatchewan Regiment
- SSB
- Special Service Battalion
- SSB
- Superintendent of Shipbuilding
- SSC
- Secretary Naval Staff Committee
- SSCRU
- Signals Section Canadian Reinforcement Units
- SSDRCOC
- Special Salvage Detachment, Royal Canadian Ordnance Corps
- SSE
- Superintendent Admiralty Signal Establishment
- SSE
- Staff Sergeant
- SSEAP
- Summer Student Employment Assistance Program
- SSEIN
- Staff Sergeant Instructor
- SSIB
- Special Services Infantry Battalion
- SSM
- Squadron Sergeant-Major
- SSM
- Staff Sergeant-Major
- SSM&SR
- Sault Ste. Marie & Sudbury Regiment
- SSMI
- Squadron Sergeant-Major Instructor
- SSO
- Special Signals Office or Squadron Signal Officer
- SSO
- Senior Staff Officer
- SSpec
- Security Specialist
- SSR
- South Saskatchewan Regiment
- SSRC
- Small Scale Raiding Craft
- SSRCA
- Special Section, Royal Canadian Artillery
- SSRF
- Small Scale Raiding Force
- SSS
- Security Service Section
- SSS&S-S
- Sussex Services Staff & Sub-Staff
- SST
- Secretary Strathcona Trust
- SStaffsR
- South Staffordshire Regiment
- SSTech
- Safety Systems Technician
- St
- Staff
- St
- Standing
- ST
- Ship's Storeman
- ST
- Seaman Torpedoman
- ST
- Steward
- Sta
- Stationary
- StaffYeo
- Staffordshire Yeomanry
- Stat
- Stationary
- StatEng
- Stationary Engineer
- StatHosp
- Stationary Hospital
- Stats
- Statistics
- Staty
- Stationary Hospital - large movable hospital of between 400 and 1,000 beds
- StatyHosp
- Stationary Hospital - large movable hospital of between 400 and 1,000 beds
- STCDB
- Special Tunnelling Company Detachment "B"
- STD
- Signals Training Detachment
- STD
- Steward
- STE
- Stokers' Training Establishment
- STED
- Superintendent of Torpedo Experimental Design
- Steno
- Stenographic Pool
- STEP
- Skilled Trades Entry Plan
- Stew
- Steward
- StFXU
- Saint Francis Xavier University
- StJFus
- St. John Fusiliers
- StJSofAI
- St. Jerome School of Army Instruction
- STK
- Special Tanker
- STK
- Stockbroker
- Stn
- Station
- Sto
- Stoker
- STO
- Sea Transport Officer
- STO
- Squadron Torpedo Officer
- Sto 1c (or 2c)
- Stoker, 1st Class (or 2nd Class)
- STP
- Supervision Training Personnel
- Str
- Strength
- ST-SE
- Staff Sergeant
- STTD
- Senior Technician (Naval)
- STTD
- Senior Technician, Technical Davison
- Stwd
- Steward
- Stwd(Prob)
- Steward (Probationer)
- SU
- Signals Units
- SU
- Staging Unit
- SU
- Staging Units
- SU
- Surgeon
- SUACW
- Sub-Unit Assumption College Windsor
- SUB
- Submarine
- Suballce
- Subsistence Allowance
- Sub-Lieut
- Sub-Lieutenant
- Subs
- Subsequently
- SUEP
- Subsidized University Education Plans
- SuffR
- Suffolk Regiment
- SuffYeo
- Suffolk Yeomanry
- SUMA
- Surgeon Major
- SUMIRCEME
- Section Unit Maintenance Inspection, Royal Canadian Electrical and Mechanical Engineers
- SUNWMP
- Superintendent North West Mounted Police
- Sup
- Supply
- Sup
- Supplement
- SUP
- Supply Officer
- SUPE
- Superintendent
- SUPEG
- Eastern Group Supply Council
- Supp
- Supplement
- SuppPtIIO(C)
- Supplementary Part II Orders (Consolidated)
- SuppPtIIOrdersUEUKwithAAI(C)
- Supplementary Part II Orders Units Expeditionary United Kingdom with Allied Armies in Italy (Consolidated)
- SuptARY
- Superintendent Aircraft Repair Yard
- SupTech
- Supply Technician
- Supvr
- Supervisor
- Surg
- Surgeon
- Surg(Rank)
- Surgeon (Rank)
- Surg(Rank)forDD
- Surgeon (Rank) for Dental Duties
- SurgGen
- Surgeon General
- Surp
- Surplus
- SurvCE
- Surveyor Construction Engineering
- SUS
- Soldier Under Sentence
- SussYeo
- Sussex Yeomanry
- SV
- Supply Vessels
- SVCBN
- Service Battalion
- Svce
- Service
- SVD
- Superintendent Victuallying Depot
- SVEO(M)
- Senior Vernon Equipment Officer (Maintenance)
- SVSO
- Superintending Victuallying Store Officer
- Svy(s)
- Survey(s)
- SvyBty(Regt)
- Survey Battery (Regiment), Royal Canadian Artillery
- SvyCoy
- Survey Company, Royal Canadian Engineers
- SW
- Shell or Shrapnel Wound - wound type of wound received from shrapnel or shell fragment
- SW
- Steward
- SW/SRCOC
- Sub Workshop, Royal Canadian Ordnance Corps
- SW/TO
- Staff Wireless Telegraphy Officer (Naval)
- SWA
- South West Atlantic Area
- SWalesBord
- South Wales Borderers
- Swbd
- Switchboard
- SWD
- Superintendent of Welding Development
- SWD(N)(MS)
- Superintendent of Welding Development (Naval) (Merchant Shipping)
- SWGISCIC
- Special Wireless Group Intelligence Section, Canadian Intelligence Corps
- SWGRCS
- Special Wireless Group, Royal Canadian Signals
- SWO
- Squadron Wireless Telegraphy Officer
- SWPA
- South West Pacific Area
- SWPAKFRON
- South-west Pacific Sea Frontier
- SWRCEME
- Sub Workshop, Royal Canadian Electrical and Mechanical Engineers
- SWS
- Special Wireless Station, Royal Canadian Signals
Military abbreviations used in service files starting with T
- T
- Training
- T
- Territorial
- T
- Torpedo
- T&DU
- Trials & Demonstration Unit
- T&SWCACTE
- Technical & Schools Wing, Canadian Armoured Corps Training Establishment
- T&T
- Through & Through
- T(B)TC
- Temporary (Basic) Training Centre
- T(No)B
- Treasury Board Minutes
- T/
- Temporary (appointed rank)
- T/A
- Torpedo Aircraft
- T/P
- Teleprinter
- TA
- Torpedo Armourer
- TABTD
- Vaccine Against Typhoid, Paratyphoid A & B, Tetanus & Diphtheria
- TAC
- Tactical Air Command
- TAF
- Tactical Air Force
- TAF
- Temporary Air Facilities
- TAG
- Trinidad-Guantanamo Convoy
- TAGS
- Telegraphist Air Gunner's School
- TankAux
- Tankers (Auxiliary)
- TankFA
- Tankers Fleet Auxiliary
- TASC
- Training Area Selection Committee
- TA-TkBRCA
- Training Anti-Tank Battery, Royal Canadian Artillery
- TATP
- Technical Apprentice Training Plan
- TBG
- Training Brigade Group
- TBW/SRCOC
- Training Brigade Workshop, Royal Canadian Ordnance Corps
- TC
- Transit Camp
- TC
- Training Centre
- TC
- Tunnelling Company
- TC
- Torpedo Coxswain
- TCAC(CO)
- The Canadian Armoured Corps (Corps Orders)
- TCADSRCCS
- Troop Canadian Armoured Division Signals, Royal Canadian Corps of Signals
- TCCRCASC
- Training Composite Company, Royal Canadian Army Service Corps
- TCHRCAMC
- Toronto Convalescent Hospital, Royal Canadian Army Medical Corps
- TCP
- Time Credit for Promotion
- TCRCAMC
- Training Command, Royal Canadian Army Medical Corps
- TCS
- Transport Conversion Squadron
- TCV
- Troop Carrying Vehicle
- TD
- Training Depot
- TD
- Temporary Duty
- TD
- Torpedo Detector
- TDDEE
- Task Design Development Experimental Establishment
- TDF
- Test and Development Flight
- TDR
- Tank Delivery Regiment
- TE
- Teamster
- tech
- technical
- TechAMed
- Technical Assistant Medical
- Tel
- Telegram
- Tel
- Telegraphist
- Tel
- Telephone
- Tel(SO)
- Telegraphist (Special Operator)
- Tele
- Telegraph or telegraphic
- Tele
- Telephone
- TelMSupt(A)
- Telecommunications Maintenance Superintendent (Air)
- TelMSupt(G)
- Telecommunications Maintenance Superintendent (Ground)
- TEO
- Torpedo Engineer Officer
- TEREME
- Training Establishment, Royal Electrical and Mechanical Engineers (British Unit)
- TES
- Technical and Engineer School
- TF
- Task Force
- TF
- Territorial Force
- TFC
- Time of 1st Gall (U.S.)
- TFCRCE
- Training Field Company, Royal Canadian Engineers
- TFEM
- Territorial Force Efficiency Medal
- TFNS
- Territorial Force Nursing Service
- TFRRCA
- Training Field Regiment, Royal Canadian Artillery
- TFWM
- Territorial Force War Medal
- TG
- Task Group
- TGM
- Torpedo Gunner's Mate
- TgTech
- Telegraph Technician
- TH
- Trinidad-Halifax convoy
- THCP
- Tin Hats Concert Party
- THGHRCAMC
- The Horseman General Hospital, Royal Canadian Army Medical Corps
- THI
- Time Handed In
- THU
- Temporary Holding Unit
- THV
- Trinity House Vessel
- TI
- Technique of Instruction
- TI
- Torpedo/Anti-Submarine Instructor
- TID
- Tour of Instructional Duty
- TIU
- Training Incoming Units
- tk
- Tank Delivery Regiment
- Tk
- Tank
- Tk(s)
- Tank(s)
- TL
- Trade Level
- TLAABRCA
- Training Light Anti-Aircraft Battery, Royal Canadian Artillery
- TLC
- Tank Landing Craft
- Tlr
- Tailor
- TLTS
- Technical Landline Training School
- TM
- Trench Mortar
- TMB
- Trench Mortar Battery - small- to medium-calibre mortars used in infantry support and to shell enemy trenches
- TMCA
- Terrace Military Camp Area
- TMH
- Toronto Military Hospital
- TMH
- Tracadie Military Hospital
- TMHRCAMC
- Terrace Military Hospital, Royal Canadian Army Medical Corps
- TMR
- The Midland Regiment
- Tnig
- Tunnelling
- TO
- Transport Officer (only when used with bde, bn, etc.)
- TO
- Training Officer
- TO
- Torpedo Officer
- TO
- Telegraph Operator
- TO
- Transport Officer or Torpedo Officer
- TOD
- Time of Despatch or Time of Delivery (U.S.)
- TOET
- Test of Elementary Training
- TOO
- Time of Origin
- TOp
- Teletype Operator
- topo
- topographic(al)
- TOR
- Time of Receipt (U.S.)
- TOR(T)
- The Ontario Regiment (Tank)
- TORP
- Torpedo (U.S.)
- TOS
- Terms of Service
- TOS
- Taken on Strength - entry of a soldier to a unit
- Tot
- Total
- TP
- Training Plan
- TP
- Temporary Pay
- TP
- Trumpeter
- Tp(s)
- Troop(s)
- TPCCourse
- Telecommunications Performance Checker Course
- TPDCPC
- Training Provost Detachment Canadian Provost Corps
- TPG
- Temporary Parade Ground
- Tpr
- Trooper - lowest rank in a cavalry unit
- Tps
- Troops
- Tpt
- Transport
- Tptr
- Trumpeter
- TQ
- Tradesmens Qualification
- TQ&E
- Trade Qualifications and Employment
- TQMS
- Technical Quartermaster Sergeant
- Tr
- Training
- TR
- Training Records
- TR
- Trooper
- TR
- Training Reserve
- Trans
- Transferred - to be sent from one unit or location to another
- Transf
- Transferred - to be sent from one unit or location to another
- TransSqn
- Transport Squadron (Royal Canadian Air Force)
- Trav
- Travel
- TRE
- Telecommunications Research Establishment
- TRE
- Temporary Reserve Employment
- Tres(Army)
- Chief Treasury Officer (Army)
- Tres(Navy)
- Chief Treasury Officer (Naval Services)
- trg
- Training Centre
- TRG
- Training
- TrgO
- Training Officer
- TrgVes
- Training Vessels
- Trlr
- Trawler
- TrngCoy
- Training Company
- TROF
- Transport Officer
- TRR
- Régiment de Trois-Rivières (French only)
- Trshp
- Troop Ships
- TRU
- Trumpeter
- TRV
- Torpedo Recovery Vessel
- TS
- Trade School
- TS
- Top Secret
- TS
- Transport Specials
- TS(Records)
- Trainees Section
- TSBadge
- Trained Soldier's Badge
- TSDS
- Two Speed Destroyer Sweep
- TSDSRCCS
- Toronto Section Division Signals, Royal Canadian Corps of Signals
- Tsfr
- Transfer
- TSM
- Troop Sergeant Major
- TSO
- Technical Staff Officer
- TSR
- Torpedo Spotting Reconnaissance (Aircraft)
- TSR
- Trained Soldier Regiment
- TSR
- Transport Special Reserve
- TSR(MG)
- Toronto Scottish Regiment (Machine Gun)
- TSU
- Technical Signals Unit
- TSV
- Torpedo School Vessel
- TTC
- Temporary Transit Camp
- TTC
- Temporary Training Centre
- TTS
- Technical Training Schools
- TTS
- Trades Training School
- TU
- Tactical Urgency
- TU
- Task Unit
- TunCoy
- Tunnelling Company
- Turco
- Turn Round Control (Overlord)
- TVC
- Thames Valley Camp
- TW
- Transport Warrant
- TW
- Travel Warrant
- TZ
- Tyneside Division
Military abbreviations used in service files starting with U
- U
- University
- UATC
- University Air Training Corps
- UATCS
- University Air Training Corps Squadrons
- UC
- United Kingdom-Caribbean convoy
- UCC
- United Church of Canada
- UD
- University Detachments
- UG
- United States-Gibraltar convoy
- UIC
- Unit Identification Code
- UK
- United Kingdom
- UKALM
- United Kingdom Air Liaison Mission
- UKAR
- United Kingdom Approach Routes
- UKCC
- United Kingdom Commercial Corporation
- UKSA
- United Kingdom Shipping Adviser
- UL
- Unattached List
- ULNDHQ(D)
- Unattached List National Defence Headquarters (Details)
- ULO
- University Liaison Officer
- UMHRCAMC
- Utopia Military Hospital, Royal Canadian Army Medical Corps
- UMS
- Unit Medical Section
- UMSP
- Undergraduate Medical Subsidization Plan
- UNAL
- Unallotted
- UNDOF
- United Nations Disengagement Observer Force (Golan Heights)
- UNEFME
- United Nations Emergency Force Middle East
- UNFICYP
- United Nations Force in Cyprus
- UNIFIL
- United Nations Interim Force in Lebanon
- UNIPOM
- United Nations India Pakistan Observation Mission
- Univ
- University
- unk
- unknown - location of a soldier is not known
- UNMOGIP
- United Nations Military Observer Group in India and Pakistan
- UNOGIL
- United Nations Observer Group in Lebanon
- UNT
- Untrained
- UNTD
- University Naval Training Division
- UNTEA
- United Nations Temporary Executive Authority in West Guinea
- UNTSO
- United Nations Truce Supervision Organization in Palestine
- UNYOM
- United Nations Yemen Observation Mission
- UofT
- University of Toronto
- UofTO/STrCoy
- University of Toronto Overseas Training Company
- UPDRCAPC
- Unit Pay Detachment, Royal Canadian Army Pay Corps
- UPDT
- Unit Personnel Data Transaction
- URDIS
- Your Despatch (U.S.)
- URTP
- University Reserve Training Plan
- US
- United States (of America)
- US(A)
- United States (Army)
- USA
- United States Army
- USA
- United States of America
- USAAF
- United States Army Air Force
- USAD
- United States Army Depot (or Sub-Depot)
- USAHS
- United States Hospital Ship
- USAT
- United States Army Transport (U.S.)
- USCG
- United States Coast Guard
- USCGC
- United States Coast Guard Cutter
- USDUE
- United States Distinguished Unit Emblem
- USED
- United States Engineering Department
- USLOM
- United States Naval Senior Line Officer at -
- USMC
- United States Marine Corps
- USMNAM
- United States Military, Naval and Air Mission
- USN
- United States Navy
- USNAAB
- United States Naval Advanced Amphibious Base
- USNAATB
- United States Naval Advanced Amphibious Training Base
- USNAATSB
- United States Naval Advanced Amphibious Training Sub. Base
- USNAMSB
- United States Naval Advanced Maintenance Sub. Base
- USNATB
- United States Naval Amphibious Training Sub. Base
- USNAVPO
- United States Naval Port Officers
- USNLOS
- United States Naval Liaison Officers
- USNR
- Unites States Navy Reserve
- USNSD
- United States Naval Stores and Spare Parts Depot
- USNTSD
- United States Navy Technical Division
- USRO
- United States Routing Officers
- USS
- United States Ship
- USShip
- United States Ship
- USSR
- Union of Socialist Soviet Republics
- UT
- Unsuitable for Training
- UTO
- Unit Training Officers
- UTPM
- University Training Plan (Men)
- UTPM(CMC)
- University Training Plan Men (at Canadian Military Colleges)
- UTPM(U)
- University Training Plan Men (At Civilian Universities)
- UTPNCM
- University Training Plan Non-Commissioned Members
- UVF
- Ulster Volunteer Force
- UWOC
- University of Western Ontario Contingent
Military abbreviations used in service files starting with V
- V&FVAO
- Vancouver & Fraser Valley Area Orders
- V/Chief
- Vice Chief
- V/S
- Visual Signalling
- V/T
- Visual Telegraphy
- VA
- Victualling Assistant
- V-A
- Vice-Admiral
- VA(No)
- Vice-Admiral (No.) Battle Squadron
- VAABH
- Victor Animatophone and Bell & Howell
- VAC
- Veterans Affairs Canada
- VAC(FleetorSqdn)
- Vice-Admiral Commanding (Fleet or Squadron)
- VACSTC
- Vernon Army Cadet Summer Training Centre
- VAD
- Voluntary Aid Detachment
- VC
- Victoria Cross
- VCCO
- Vice-Chief of Combined Operations
- VCDCMSC
- Valcartier Camp Detachment, Corps of Military Clerks
- VCDS
- Vice Chief of the Defence Staff
- VCGS
- Vice Chief of the General Staff
- VCIGS
- Vice Chief of the Imperial General Staff
- VCMHRCAMC
- Valcartier Camp Military Hospital, Royal Canadian Army Medical Corps
- VCNO
- Vice-Chief of Naval Operations (U.S.)
- VCNS
- Vice Chief of the Naval Staff
- VCR
- Veterans Care Regulations
- VD
- Volunteer Officer's Decoration
- VD
- Colonial Auxiliary Forces Officer's Decoration
- VD
- Venereal Disease
- VdeQ
- Les Voltigeurs de Québec
- VDG
- Venereal Disease - Gonorrhea
- VDH
- Valvular Disease of the Heart
- VDS
- Venereal Disease - Syphilis
- VE(J)
- Victory in Europe (Japan)
- veh(s)
- vehicle(s)
- Vet
- Veterinarian
- Vety
- Veterinary
- VFS
- Verification of Former Service
- VGofC
- Veterans Guard of Canada
- VHF
- Very High Frequency
- VHG
- Veterans Home Guard (Now Veterans Guard of Canada)
- V-I
- 14th Reinforcement Draft Overseas V1
- VIF
- Volunteers Interim Force
- V-II
- 14th Reinforcement Draft Overseas V2
- VIP
- Veterans Independence Program
- VIS
- Visibility
- VLC
- Victory Loan Convoy
- VLF
- Very Low Frequency
- VLR
- Very long Range
- VMA
- Vernon Military Area
- VMC
- Vernon Military Camp
- VMC
- Vehicle Maintenance Course
- VMH
- Vancouver Military Hospital
- VMH
- Victoria Military Hospital
- VMHRCAMC
- Valleyfield Military Hospital, Royal Canadian Army Medical Corps
- VMHRCAMC
- Vermilion Military Hospital, Royal Canadian Army Medical Corps
- VMHRCAMC
- Vernon Military Hospital, Royal Canadian Army Medical Corps
- VO
- Veterinary Officer
- Voltigeurs
- Les Voltigeurs de Québec
- VolTrans
- Voluntary Transfer
- VPT
- Volunteered for Pacific Theatre
- VR
- Volunteer Reserve
- VRC
- Victoria Rifles of Canada
- VRD
- Naval Volunteer Reserve Decoration
- VRD
- Vehicle Repair Depot
- VRDHQ
- Volunteer Reserve Divisional Headquarters
- VRofC
- Victoria Rifles of Canada
- VS
- Veterinary Surgeon
- VS
- Victualling Storesman
- VSDRCOC
- Vancouver Sub Depot, Royal Canadian Ordnance Corps
- VSIS
- Victualling Store Issuing Ship
- VSO
- Victualling Store Officer
- VSU
- Veteran Surgeon
- VTO
- Visual Training Officer
- VTS
- Vocational Training School
Military abbreviations used in service files starting with W
- w
- wounded - injury caused by enemy action
- W
- West
- W&B
- Director of Works & Buildings (Naval)
- W&PCRCE
- Workshop & Park Company, Royal Canadian Engineers
- W&SSOp
- Water and Sanitation Service Operator
- W&T
- Wireless & Telephony
- w/
- with
- W/C
- Wing Commander
- W/K
- Watchkeeping
- W/Mech
- Wireless Mechanic
- W/O
- Wireless Operator
- W/Op
- Wireless Operator
- W/S
- Workshop
- W/T
- Wireless Telegraphy
- W/TBd
- Wireless Telegraphy Board
- W/TCal
- Wireless Telegraphy Calibration Vessels
- W/TO
- Wireless Telegraphy Officer
- W/TStation
- Wireless Telegraphy Station
- WA
- Watchman
- WA
- Western Approaches
- WA
- Weaponman Air
- Wa/T
- Warning Telephone
- WAAC
- Women's Auxiliary Army Corps
- WAC
- Western Air Command
- WAC
- War Assets Corporation
- WAf
- West Africa
- WAFF
- West Africa Frontier Force
- WAG
- Wireless Air Gunner
- WAI
- Waiter
- WarwickYeo
- Warwickshire Yeomanry
- WAt
- Western Atlantic
- WB
- Whizz Bang
- WBBV
- Company of Waterborne Balloon Barrage Vessels
- WC
- Western Canada
- WCLC
- Western Command Labour Company
- WCO
- War Cabinet Offices
- WCRCE
- Works Company, Royal Canadian Engineers
- WCRCE(A)
- Works Company, Royal Canadian Engineers (Active)
- WCRCE(R)
- Works Company, Royal Canadian Engineers (Reserve)
- Wd
- wounded - injury caused by enemy action
- WD
- Women's Division
- WD
- War Diary
- WD
- War Department
- WDCS
- War Disease Control Station
- WDV
- War Dept. Vessel or Wreck Dispersal Vessel
- WE
- War Establishment
- WE
- With Effect
- WEA
- Weather (U.S.)
- wef
- with effect from
- WEF
- Western Escort Force
- WEF
- Winter Experimental Flight
- Welsh R
- Welsh Regiment
- WelshH
- Welsh Horse
- WEM
- Wireless Electrical Mechanic
- WESEAFRON
- Western Sea Frontier (U.S.)
- West&CumbYeo
- Westmoreland & Cumberland Yeomanry
- WestmrR(Mot)
- Westminster Regiment (Motor)
- WestNSR
- West Nova Scotia Regiment
- WESTOMP
- West Ocean Meeting Point
- WETP
- War Emergency Training Program
- WF
- Canadian Army Postal Corps # 1, Canadian Army Overseas
- WF
- Canadian Army Postal Corps # 1, 2, 3, 4, 5
- WF
- Lewisporte, Newfoundland
- WF
- Phillips Head
- WF
- St. John's
- WF
- Government of Canada Canadian Troops
- WF
- W. Force (Newfoundland)
- WF
- Wiseman's Point
- WFCRCEME
- "W" Force Company, Royal Canadian Electrical and Mechanical Engineers
- WFERCCS
- Western Fortress Establishment, Royal Canadian Corps of Signals
- WFODRCOC
- "W" Force Ordnance Depot, Royal Canadian Ordnance Corps
- WFPD
- "W" Force Postal Detachment
- WFSIS
- "W" Force Security Intelligence Section
- WG(MG)
- Winnipeg Grenadiers (Machine Gun)
- WGDS
- Welsh Guards
- Wgnr
- Waggoner
- Whlr
- Wheeler
- WICS
- Wainwright Internment Camp Staff
- WIHQDCRCE
- (Welding) Increment Headquarters Drilling Company, Royal Canadian Engineers
- WiltsR
- Wiltshire Regiment
- Wiltsyeo
- Wiltshire Yeomanry
- WIR
- West India Regiment
- WIS(IC)
- Wireless Intelligence Section (Intelligence Corps)
- WK
- Watchkeeping Certificates
- Wkr
- Worker
- wks
- weeks
- Wks
- Works
- WksCoy
- Works Company
- WkShop
- Workshop Depot
- Wkshp&PkCoy
- Workshop and Park Company
- wksp
- workshop
- WLI
- Winnipeg Light Infantry
- WM
- Wireless Mechanic
- WMH(HWE)RCAMC
- Woodstock Military Hospital (Home War Establishment) Royal Canadian Army Medical Corps
- WMH(RCAMC)
- Wetaskiwin Military Hospital, Royal Canadian Army Medical Corps
- WMH(RCAMC)
- Weston Military Hospital, Royal Canadian Army Medical Corps
- WMH(RCAMC)
- Windsor Military Hospital, Royal Canadian Army Medical Corps
- WMH(RCAMC)
- Wolsely Military Hospital, Royal Canadian Army Medical Corps
- WNSR
- West Nova Scotia Regiment
- WNYDN
- Wounded Not Yet Determined Nervousness (Neurasthenia)
- WO
- War Office
- WO
- Warrant Officer
- WO1
- Warrant Officer Class 1 or First Class
- WO2
- Warrant Officer Class 2 or Second Class
- WOAG
- Wireless Operator / Air Gunner
- WOCARCE
- Works Organization Canadian Army, Royal Canadian Engineers
- WOCO
- Wren Ordinary Communications Operator (Radio) Standard
- WOI
- Warrant Officer Class 1
- WOII
- Warrant Officer Class 2
- WOIII
- Warrant Officer, Class 3
- WOR
- Western Ontario Regiment
- WorcR
- Worcestershire Regiment
- WorcYeo
- Worcestershire Yeomanry
- WORD
- Western Ontario Regimental Depot
- WPL
- Western Hemisphere Defence Plan
- WPPS
- Western Patrol Periodical Signal
- WPS
- Warship Production Superintendent
- WR
- Ship's Writer
- WR
- Writer
- WR
- Waterways and Railways
- WR(M)
- Westminster Regiment (Motor)
- WRAF
- Women's Royal Air Force
- WRCNS
- Women's Royal Canadian Naval Service
- WRD
- Wireless Relay Detachments
- WRidR
- West Riding Regiment
- WRNS
- Women's Royal Naval Service
- WRR
- West Riding Regiment
- WRS
- Wireless and Radio Schools
- WS
- Wireless School
- WS
- Weaponman Surface
- WSB
- War Supply Board
- WSC
- War Staff College
- WSG
- War Service Gratuity
- WSHCRCAMC
- Women's Services Health Centre, Royal Canadian Army Medical Corps
- WSItoCASSU
- Wireless Section Increment to Canadian Air Support Signal Unit
- WSomYeo
- West Somerset Yeomanry
- wt
- wireless telegraphy
- Wt
- Warrant
- WT
- Water Transport
- WtCatO
- Warrant Catering Officer
- WtCkO
- Warrant Cook Officer
- WTCS
- War Transport Committee Suez
- WTel
- Warrant Telegraphist
- Wtelegr
- Warrant Telegraphist
- WtEng
- Warrant Engineer
- WtMAA
- Warrant Master At Arms
- WtO
- Warrant Officer
- WTO
- Western Theatre of Operations
- WtOffr
- Warrant Officer
- WtOO
- Warrant Ordnance Officer
- WtPatO
- Warrant Patrol Officer
- WtPhoto
- Warrant Photographer
- Wtr
- Writer
- WTS
- Winter Training School
- WtShpt
- Warrant Shipwright
- WtSO
- Warrant Stores Officer
- WtW
- Warrant Writer
- WtWO
- Warrant Writer Officer
- WU
- Weaponman Underwater
- WU
- Weaponman Underwater
- WUB
- Working Up Base
- WVA
- War Veteran's Allowance
- WW
- World War
- Wyorks
- West Yorkshire Regiment
Military abbreviations used in service files starting with X
- X-1
- Prisoners of war (verified)
- X-1 POW (D)
- Prisoners of War (Dieppe)
- X-10
- All reinforcement personnel attached away from reinforcement units under appropriate authority
- X-10LGLB
- X-10 List General List B
- X-11
- All Red Cross and Auxiliary services personnel
- X-12
- At depot awaiting discharge
- X-2
- All ranks under sentence of detention, imprisonment or penal servitude
- X-3
- All ranks evacuated on medical grounds behind Regimental Aid Posts
- X-4
- Unposted reinforcements in the theatre of war belonging to the unit or corps
- X-4L
- X-4 List
- X-5
- All ranks on courses of twenty-one days or over in the theatre of war
- X-6
- All ranks posted as missing
- X-7
- All ranks seconded from the Canadian Army to other Allied Forces in the theatre of war
- X-8
- All non-effective held at Base Reinforcement Units whose return to the UK has been authorized
- X-9
- All personnel held at Base Reinforcement Units, who, for one reason or another, are not available as reinforcements and whose disposition is still to be decided
- XB
- Halifax-Boston convoy
- XDO
- Extended Defence Officer
- X-L"A"RCA
- X-List "A" Royal Canadian Artillery
- X-L(RCCS)
- X-List (Royal Canadian Corps of Signals)
- X-L(UK)GL
- X-List (United Kingdom) General List
- X-LCAC
- X-List Canadian Armoured Corps
- X-LCDC
- X-List Canadian Dental Company
- X-LCIC(CMF)
- X-List Canadian Intelligence Corps (Central Mediterranean Force)
- X-LCMSC
- X-List Corps of Military Staff Clerks
- X-LCoftheRCE
- X-List Corps of the Royal Canadian Engineers
- X-LCPC
- X-List Canadian Postal Corps
- X-LCProC
- X-List Canadian Provost Corps
- X-LCSGHQECMFD
- X-List Canadian Section General Headquarters Echelon, Central Mediterranean Force Detachment
- X-LCWAC
- X-List Canadian Women's Army Corps
- XLG(CMF)
- X List General (Central Mediterranean Force)
- X-LGL
- X-List General List
- X-LGL(O)
- X-List General List (Officers)
- X-LGLSuppPtIIO
- X-List General List Supplementary Part II Orders
- X-List
- List maintained by Units of Prisoners of War & Officers & Other Ranks who are missing due to enemy action
- X-LofCL
- X-List of Canloan List
- X-LRC
- X-List Red Cross
- X-LRCA
- X-List Royal Canadian Artillery
- X-LRCA(A/TkR)
- X-List Royal Canadian Artillery (Anti-Tank Regiments)
- X-LRCA(AAR)
- X-List Royal Canadian Artillery (Anti-Artillery Regiments)
- X-LRCA(MR)
- X-List Royal Canadian Artillery (Medium Regiments)
- X-LRCA(SR)
- X-List Royal Canadian Artillery (Survey Regiments)
- X-LRCAMC
- X-List Royal Canadian Army Medical Corps
- X-LRCAPC
- X-List Royal Canadian Army Pay Corps
- X-LRCAS"B"
- X-List Royal Canadian Artillery Section "B"
- X-LRCASC
- X-List Royal Canadian Army Service Corps
- X-LRCASCBCBRD
- X-List Royal Canadian Army Service Corps Battalion, Canadian Base Reinforcement Depot
- X-LRCE
- X-List Royal Canadian Engineers
- X-LRCEME
- X-List Royal Canadian Electrical and Mechanical Engineers
- X-LRCOC
- X-List Royal Canadian Ordnance Corps
- X-LtoC"Q"L
- X-List to Canadian "Q" List
- X-NAL
- X-North Africa List
- XO
- Executive Officer
- XV
- Examination Vessels
Military abbreviations used in service files starting with Y
- Y&LR
- York & Lancaster Regiment
- YAG
- District Auxiliary Vessel, Miscellaneous (U.S.)
- Ydepot
- Overseas Transit Depot
- Yeo
- Yeoman
- YeoofSigs
- Yeoman of Signals
- YeoSigs
- Yeoman of Signals
- YF
- Covered Lighter (U.S.)
- YFB
- Ferryboat
- YFORCE
- Kingston, Jamaica Forces, British West Indies
- YG
- Garbage Lighter (U.S.)
- YISMHRCAMC
- York Island Station Military Hospital Royal Canadian Army Medical Corps
- YL
- "Y" List
- YMCA
- Young Men's Christian Association
- YMHRCAMC
- Yarmouth Military Hospital Royal Canadian Army Medical Corps
- YMS
- Y Class Minesweeper or Minesweeper (Motor) (U.S.)
- YMT
- Motor Tug (U.S.)
- YN
- Boom Defence Vessel
- YNg
- Gate Vessel (U.S.)
- YNT
- Net Tender (Tug class) (U.S.)
- YO
- Fuel Oil Barge (U.S.)
- YOG
- Gasoline Barge/Tanker (U.S.)
- YorkDns
- Yorkshire Dragoons
- YorkHrs
- Yorkshire Hussars
- YS
- Yugo-Slav Ship
- YT
- Tug Harbour (U.S.)
- YT
- Yukon Territory
- YTEP
- Youth Training Employment Program
- YTT
- Torpedo Testing Barge (U.S.)
- YW
- Water Barges (U.S.)
Military abbreviations used in service files starting with Z
- ZFORCE
- Iceland
- ZG
- Panama-Guantanamo convoy