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
AUTO: Automatic Launch Command
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