Ever wondered what those initials meant ?
| A&GS | Armament & Gunnery School |
| A&IEU | Armament & Instrument Experimental Unit |
| A&P | Airframe & Powerplant |
| A.C.R.C. | Aircrew Receiving Centre |
| A/C | Aircraft |
| A/Cdre | Air Commodore |
| A/S | Antisubmarine |
| AA | Air Attache |
| AA | Antiaircraft |
| AAC | Anti Aircraft Co-operation |
| AAC | Army Air Corps |
| AACC | Army Air Corps Center |
| AACF | Anti-aircraft Co-operation Flight |
| AACTDU | Army Air Corps Tactical Development Centre |
| AACU | Anti-aircraft Co-operation Unit |
| AAEE | Aeroplane and Armament Experimental Establishment |
| AAF | Anti Aircraft Flight |
| AAF | Auxiliary Air Force |
| AAFCE | Allied Air Forces, Central Europe |
| AAFNE | Allied Air Forces Northern Europe |
| AAFSE | Allied Air Forces Southern Europe |
| AAGS | Air Armament & Gas School |
| AAITS | Airmen Aircrew Initial Training School |
| AANS | Advanced Air Navigation School |
| AAP | Air to Air Missile |
| AAP | Aircraft Acceptance Park |
| AAP | Army Aircraft Park |
| AAPC | Anti Aircraft Practice Camp |
| AAR | Air to Air Refueling |
| AAS | Air Armament School |
| AASF | Advanced Air Striking Force |
| AATE | Air Armament trials Establishment |
| AATT&DC | Army Air Transport Training & Development Centre |
| AATTF | Anti-Aircraft and Target Towing Flight |
| AAU | Air Ambulance Unit |
| AAU | Aircraft Acceptance Unit |
| AAU | Aircraft Assembly Unit |
| AB | Air Base |
| ABC | Airborne Cigar |
| ABGS | Air Bombing & Gunnery School |
| ABTF | Air Bombing Training Flight |
| AC | Aircraftman |
| AC1 | Aircraftman First Class |
| AC2 | Aircraftman Second Class |
| ACAC | Aircrew Allocation Center |
| ACATC | Air Cadets Adventure Training Centre |
| ACC | Air Control Center |
| ACC | Allied Control Commission |
| ACC | Armoured Car Company |
| ACC | Army Co-operation Command |
| ACCF | Army Co-operation Command Communication Flight |
| ACCGS | Air Cadet Central Gliding School |
| ACDC | Aircrew Despatch Centre |
| ACDU | Air Combat Development Unit |
| ACDU | Army Co-operation Development Unit |
| ACDW | Air Crew Disposal Wing |
| ACFSS | Air Cadets Flying Scholarship Scheme |
| ACGFSOC | Air Cadet Gliding Flight Safety Officer's Course |
| ACGS | Assistant Chief of the General Staff |
| ACH | Advanced Chain Home |
| ACH | Air Craft Hand |
| ACHU | Aircrew Holding Unit |
| ACI | Air Council Instruction |
| ACIs | Air Council Instructions |
| ACM | Air Chief Marshal |
| ACO | Advanced Chain Overseas |
| ACO | Air Cadet Organisation |
| ACP | Air Cadet Publication |
| ACPNTS | Air Cadets Pilot Navigation Training Scheme |
| ACR | Airfield Control Radar |
| ACRC | Air Crew Reception Centre |
| ACRS | Air Crew Refresher School |
| ACS | Airfield Construction Squadron |
| ACSB | Air Crew Selection Board |
| ACSEA | Air Command South East Asia |
| ACSEA/ASS | Air Command South East Asia Air Service Squadron |
| ACTC | Air Cadet Training Centre |
| ACU | Air Conditioning Unit |
| ACW | Aircraft Control and Warning |
| ACW | Aircraftwoman |
| AD | After duty |
| AD | Air Defence |
| AD | Aircraft Depot |
| AD | Aircraft Directive |
| AD | Airworthiness Directive |
| ADC | Aide de Camp |
| ADC | Air Defence Centre |
| ADCC | Air Defence Cadet Corps |
| ADCS | Air Defence Cooperation Squadron |
| ADEM | Air Defences Eastern Mediterranean |
| ADF | Aircraft Delivery Flight |
| ADGB | Air Defence of Great Britain |
| ADGE | Air Defence Ground Environment |
| ADLS | Air Despatch Letter Service |
| ADM | Air Defence Missile |
| ADNC | Air Defence Notification Centre |
| ADRU | Air Despatch& Reception Unit |
| ADU | Aircraft Delivery Unit |
| AE | Air Efficiency |
| AEAES | Air Electronics& Air Engineers School |
| AEAF | Allied Expeditionary Air Forces |
| AEC | Assessment& Evaluation Centre |
| AED | Aircraft Equipment Depot |
| AEF | Air Experience Flight |
| AES | Air Electronics School |
| AES | Armament Experimental Station |
| AEW | Airborne Early Warning |
| AFB | Air Force Base |
| AFC | Air Force Cross |
| AFC | Australian Flying Corps |
| AFDE | Air Fighting Development Establishment |
| AFDS | Air Fighting Development Squadron |
| AFDU | Air Fighting Development Unit |
| AFE | Airborne Forces Establishment |
| AFEE | Airborne Forces Experimental Establishment |
| AFG | Air Forces Gulf |
| AFHQ | Airfield Headquarters |
| AFI | Air Force Instruction |
| AFM | Air Force Medal |
| AFMS | Air Force Medical Service |
| AFPD | Air Force Policy Directive |
| AFRC | Air Force Reserve Command |
| AFRU | Advance Flying & Refresher Unit |
| AFS | Advanced Flying School |
| AFS | Auxiliary Fighter Squadron |
| AFTCC | Air Force Troop Carrier Command |
| AFTDU | Airborne Forces Tactical Development Unit |
| AFTS | Advanced Flying Training School |
| AFTU | Advanced Flying Training Unit |
| AFTU | Air Firing Training Unit |
| AFU | Advanced Flying Unit |
| AFU | Pilots Advanced Flying Unit |
| AFWE | Air Forces Western Europe |
| AG | Air Gunner |
| AG | Airlift Group |
| AGBS | Air Gunnery & Bombing School |
| AGE | Auxiliary Ground Equipment |
| AGL | Air Gun Laying |
| AGME | Aircraft Gun Mounting Establishment |
| AGRS | Advanced Ground Radio School |
| AGRS | Air & Ground Radio School |
| AGS | Air Gunners School |
| AGS | Aircrew Grading School |
| AGT | Advanced Gliding Training |
| AGT | Airwork & General Trading |
| AGU | Airwork Grading Unit |
| AHQ | Air Headquarters |
| AI | Airborne Interception |
| AICF | AI Conversion Flight |
| AIEU | Armament and Instrument Experimental Unit |
| AIS | Air Interception School |
| AITF | AI Training Flight |
| ALG | Advance Landing Ground |
| ALO | Air Liaison Officer |
| ALS | Air Landing School |
| ALSE | Aviation Life Support Equipment |
| AM | Air Marshal |
| AM | Air Ministry |
| AMC | Aerospace Medicine Council |
| AMC | Air Mobility Command |
| AMDP | Air member for development & Production |
| AMES | Air Ministry Experimental Station |
| AMMF | Air Ministry Meteorological Flight |
| AMO | Air Ministry Order |
| AMO | Air Movement Order |
| AMRS | Air Ministry Research Station |
| AMSDU | Air Ministry Servicing Development Unit |
| AMWD | Air Ministry Works Department |
| ANBS | Air Navigation & Bombing School |
| ANS | Air Navigation School |
| AOC | Air Officer Commanding |
| AOCU | Andover Operational Conversion Unit |
| AOG | Aircraft On the Ground |
| AONS | Air Observer's Navigation School |
| AOP | Air Observation Post |
| AORG | Army Operational Research Group |
| AOS | Air Observer's School |
| AOTS | Aircrew Officers Training School |
| AP | Air Publication |
| AP | Aircraft Park |
| APC | Armament Practice Camp |
| APCS | Aden Protectorate Communication Squadron |
| APDU | Air Photography Development Unit |
| APF | Air Pilotage Flight |
| APMF | Aerial Port Mobility Flight |
| APS | Air Pilotage School |
| APS | Armament Practice Station |
| APSF | Aden Protectorate Support Flight |
| APU | Aircraft Preparation Unit |
| ARC | Aircrew Reception Centre |
| ARC | Aircrew Recruiting Centre |
| ARD | Aircraft Repair Depot |
| ARF | Air Radar Fitter |
| ARF | Aircraft Repair Flight |
| ARP | Aircraft Repair Park |
| ARS | Air Reserve Station |
| ARS | Aircraft Repair Section |
| ARU | Aircraft Repair Unit |
| ARWF | Advanced Rotary Wing Flight |
| ARWS | Advanced Rotary Wing Squadron |
| AS | Air School |
| AS | Airlift Squadron |
| AS&RU | Aircraft Salvage & Repair Unit |
| ASC | Air Support Command |
| ASC | Aircrew Selection Centre |
| ASD | Aeroplane Supply Depot |
| ASE | Aircraft Survivability Equipment |
| ASF | Air Survey Flight |
| ASF | Aircraft Servicing Flight |
| ASI | Air Speed Indicator |
| ASIMS | Aerospace Information Management System |
| ASIMS | Anti Submarine Missile |
| ASIMS | Air Stores Park |
| ASR | Air/Sea Rescue |
| ASR&CF | Air Sear Rescue & Communication Flight |
| ASRF | Air Sea Rescue Flight |
| ASRTU | Air Sea Rescue Training Unit |
| ASS | Air Signals School |
| AST | Air Service Training |
| ASTOR | Airborne Stand-Off Radar |
| ASU | Aircraft Storage Unit |
| ASV | Airborne Surface Vessel |
| ASWDU | Air-Sea Warfare Development Unit |
| ATA | Air Transport Auxiliary |
| ATAF | Allied Tactical Air Force |
| ATC | Air Traffic Control |
| ATC | Air Training Corps |
| ATC | Armament Training Camp |
| ATDC | Air Transport Development Centre |
| ATDF | Air Transport Development Flight |
| ATDU | Air Torpedo Development Unit |
| ATDU | Air Transport Development Unit |
| ATF | Autogiro Training Flight |
| ATFERO | Atlantic Ferry Organisation |
| ATGU | Aircrew Testing & Grading Unit |
| ATP | Advanced Training Poll |
| ATP | Air Transit Pool |
| ATP | Aircrew Transit Pool |
| ATREL | Air Transportable Reconnaissance Exploitation Laboratory |
| ATS | Air Training Squadron |
| ATS | Armament Training Station |
| ATS | Auxiliary Territorial Service |
| ATSDR | Agency for Toxic Substances and Disease Registry |
| ATTDU | Air Transport Tactical Development Unit |
| ATU | Advanced Training Unit |
| ATU | Air Trials Unit |
| ATU | Aircrew Transit Unit |
| ATU | Armament Training Unit |
| AUAS | Aberdeen University Air Squadron |
| AUBDS | Anti U-boat Devices School |
| AVG | American Volunteer Group |
| AVM | Air Vice Marshal |
| AW | Airlift Wing |
| AW | Armstrong Whitworth |
| AWDS | All Weather Development Squadron |
| AWF | Air Wireless Fitter |
| AWF | All weather Flight |
| AWFCS | All Weather Fighter Conversion Squadron |
| AWOCU | All Weather Operational Conversion Unit |
| AWOL | absent without leave |
| AWRE | Atomic Weapons Research Establishment |
| B&C | Barrack & Clothing |
| B&GF | Bombing & Gunnery Flight |
| B&GS | Bombing & Gunnery School |
| BABS | Blind Approach Beacon System |
| BAC | British Air Commission |
| BACB | British Air Command Berlin |
| BACF | Beam Approach Calibration Flight |
| BADU | Beam Approach Development Unit |
| BAE | British Aerospace |
| BAFF | British Air Forces in France |
| BAFO | British Air Forces of Occupation |
| BAFSEA | British Air Force South-East Asia |
| BANS | Basic Air Navigation School |
| BARU | Base Aircraft Repair Unit |
| BAS | Beam Approach School |
| BAS&HEDS | Bomber Airborne Support & Heavy Equipment Dropping Squadron |
