Library and Archives Canada
www.collectionscanada.gc.ca
Common menu bar links
Institutional links
Genealogy and Family History
What to Search: Topics
Military
- French Regime
- British Forces
- Loyalists
- German Troops
- Canadian Forces before 1914
- List of Abbreviations Used in Military Service Files
List of Abbreviations Used in Military Service Files
| Abbreviation | Meaning |
|---|---|
| 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) |
| (A) | Air |
| A&Dbooks | Admission & Discharge Books |
| A&FF | Acceptance & Ferry Flight (129-Trenton) |
| A&Q | Administrative Branches of the Staff |
| A&SHigh | Argyle & Sutherland Highlanders of Canada (Princess Louise's) |
| A&T | Administration and Training Staff |
| A&T Staff | Administrative and Training Staff |
| A/ | Acting (Rank) |
| A/ | Assistant |
| A/A | Anti-aircraft |
| A/A | Army Act |
| A/Bandsmn | Assisting Bandsman |
| A/Blkmth | Acting Blacksmith |
| A/C | Air Commodore |
| A/C | Air Crew |
| A/C | Aircraft |
| A/C | Anti-Aircraft |
| 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 |
| A7Q | Administrative Branches to the Staff |
| AA | Active Army |
| AA | Army Act |
| AA | Anti-Aircraft |
| AA | Anti-Aircraft Rate |
| AA | Assistant Adjutant |
| 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/BA | 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 |
| ABOCROC | 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 |
| ABranch | The Adjutant General's Branch of the Staff |
| Abs | Absent, Absence |
| ABW/SRCOC | Advanced Base Workshop (Royal Canadian Ordnance Corps) |
| AC | Aircraft Carrier |
| AC | Armoured Car |
| AC | Aircraft Controlman |
| AC | Army Corps |
| AC | Ambulance Corps |
| AC | Armourer's Crew |
| 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 | Atlantic Command Signals |
| ACS | Distinguishing Letters on Files of Joint Service Committee, Atlantic Coast |
| 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 | Annual Camp Training |
| Act | Acting (Rank) |
| 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 | Aerodrome Defence Company |
| 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 Engineer Services |
| ADES | Assistant Director of Educational Services |
| ADHOC(G) | Ad Hoc Greek Battalion |
| ADIO | Assistant Director of Internment Operations |
| Adj | Adjutant |
| Adjt | Adjutant |
| ADM | Assistant Deputy Minister |
| Adm | Admitted |
| Adm | Administration |
| 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 | Army Dressing Station |
| ADS | Advanced 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 | Active Force |
| AF | Air Fitter |
| AFBRCCS | Army Field Brigade, Royal Canadian Corps of Signals |
| AFC | Air Force Cross |
| AFC | Armed Forces Council |
| AFHQ | Allied Forces Headquarters |
| AFHQ | Air Force Headquarters |
| AFM | Air Force Medal |
| AFM | Air Frame Mechanic |
| AFO | Admiralty Fleet Orders |
| AFPac | Allied Forces Pacific |
| AFRS | Army Field Regiment Signal |
| AFRS | Armed Forces Radio Service |
| 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 | Advance Flying Unit |
| AFU | Air Fighting 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, 2 o r3 | 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 | Administrative and Holding Units |
| AHU | Artillery Holding Unit |
| AHU | Administrative and Holding Unit |
| AI | Acting Interpreter |
| AI | Assistant Instructor |
| 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 | Air Intelligence Liaison Section |
| AILSection | Army 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 |
| AlgR | Algonquin Regiment |
| AlgR | Algerine Escorts |
| ALI | (15th Regiment) Argyll Light Infantry |
| Allce | Allowance |
| ALO | Australian Liaison Officer (Air) |
| ALOC | Advanced Logistics Officers Course |
| ALQR | Algonquin Regiment |
| Alta | Alberta |
| AM | Albert Medal |
| AM | Air Mechanic |
| AM | Naval Airman |
| AM | Air Mechanic (1st, 2nd or 3rd Class) |
| 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 | Alberni Military Camp |
| AMC | Armed Merchant Cruiser |
| AMC | Army Medical Centre |
| AMC | Arnprior Military Camp |
| AMC | Armed Merchant Cruiser |
| AMC | Australian Medical Corps |
| AMCU | Anti-Malarial Control Unit |
| AMD | Auxiliary Manning Depot |
| Am'd | Amended |
| 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 | Air Member for Supply |
| AMS | Assistant Military Secretary |
| AMS | Army Medical Staff |
| 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 | Accountant Officer |
| AO | Army Order |
| AO | After Order |
| AO | Air Mechanic (Ordnance) |
| 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 | Air Police |
| AP | Apothecary |
| 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 | Air Radio |
| AR | Algonquin Regiment |
| 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 | Appraisal and Refresher Course |
| ARC | Army Reception Centre |
| ARC | Appraisal and Refresher Course |
| ARCM | Associate, Royal College of Music |
| ARCR | Armourer's Crew |
| ARD | Alberta Regimental Depot |
| Area Engr | Area Engineer |
| ARH | Army Rail Head |
| ARITCIC | Army Refuge 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 | Administrative Routine Orders |
| ARO | Admiralty Record Office |
| ARP | Air Raid Precautions |
| ARRC | Royal Red Cross (Associate) |
| ARRC | Associate of the Royal Red Cross |
| Art | Article |
| Art | Artillery |
| ARTech | Aircraft Refinishing Technician |
| ArtEngr | Artificer Engineer |
| Arty | Artillery |
| Arty Loc | Artillery Locator |
| Arty Svy | Artillery Surveyor |
| Arty Tech | Artillery Technician |
| Artymn | Artilleryman |
| ARU | Artillery Reinforcement Unit |
| AS | Air Secretary |
| AS | Air Radio Mechanic (Air Wireless) |
| AS&DB | Army Salvage & Disposal Board |
| ASADJ and 2L | Assistant Adjutant and Second Lieutenant |
| AS and ACSU | Assistant and Acting Surgeon |
| ASC | Army Service Corps |
| ASC | Advanced Surgical Centre |
| 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 | Area Security Officer |
| ASO | Armament Supply Officer |
| ASO | Assistant Supply Officer |
| ASO(I) | Assistant Staff Officer (Intelligence) |
| ASP | Admiralty Salvage Pontoon |
| ASP | Air Stores Park (406) (Royal Canadian Air Force) |
| ASPU | Assistant Purveyor |
| ASR | Submarine Rescue Vessel, Auxiliary (US) |
| ASS | Army Staff Section |
| ASSAMVLH | Assam Valley Light Horse |
| Asst | Assistant |
| AsstNSec | Assistant Naval Secretary |
| AsstPayr | Assistant Paymaster |
| ASSU | Air Support Signal Unit |
| ASSU | Assistant Superintendant |
| ASTO | Assistant Transport Officer |
| ASU | Air Supply Unit |
| ASU | Aircraft Storage Units |
| ASU | Assistant Surgeon |
| ASV | Anti-Surface Vessel |
| AsvyCoy | Air Survey Company |
| ASW | Anti-Submarine Warfare |
| AT | Armoured Train |
| AT | Auxiliary Tanker |
| AT | Ocean-going Tug, Auxiliary (US) |
| AT | Air Artificer (Airframes and Engines) |
| AT | Auxiliary Tanker |
| AT | Aviation Technician |
| 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 | Air Traffic 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 |
| ATps | Army Troops Company |
| 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 |
| ATTA | Full duties and return for treatment |
| Attach | Attached |
| Attachd | Attached |
| 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 |
| 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 |
| Auth | Authority |
| 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/SA | 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 Weapons Control |
| AWC | Air War College |
| AWCoy | Artizan Works Company |
| Awd’d | Awarded |
| AWF | Army War College Fellowship |
| AWL | Away With Leave |
| AWL | Absent With Leave |
| AWL | Absent Without Leave |
| AWL | Away Without Leave |
| AWOL | Absent without leave |
| AWS | Air War College Fellowship |
| AWSqn | All-weather Squadron |
| AyrYeo | Ayrshire Yeomanry |
