English abbreviations from a-p to aa
- A/P(Autopilot)
- A&P(Administrative and Personnel)
- A&Q(Alert and Que)
- A/S(Anti-submarine)
- A&S(Armament & Standardisation)
- A/SP/A(Also Spelled As ....)
- A/T(autothrottle)
- A&T(North Carolina Agricultural & Technical State University)
- A/V(Arteriole–venue ratio)
- A0(FAAD C2I Workstation computer unit)
- A10(Atlantic 10 Conference)
- A1C(Airman First Class (from 1952 to 1967 it was A2C))
- A1F(Alpha-One Foundation)
- A2(Antenne 2 ( France))
- A-2(Intelligence Staff section of United States Army Air Corps)
- A2ATD(Anti-Armor Advanced Technology Demonstrator)
- A2ATD or A2ATD(Anti-Armour Advanced Technology Demonstration)
- A2C(Airman Second Class (from 1952 to 1967 – now A1C))
- A2C2(Army Airborne Command and Control)
- A2C2 or A2C2(Army Airspace Command and Control)
- A2C2S(Army Airborne Command and Control System)
- A2I2K(Army Airborne Intelligence 2000)
- A2S3(AFATDS Application Software Segment Specification)
- A-3(Air Force Operations Directorate)
- A3(Armor/ Anti-Armor)
- A3C(Airman Third Class (from 1952 to 1967 – now Amn))
- A3MP(Armor/ Anti-Armor Master Plan)
- A4(many, including a European standard office paper size; see entry)
- A-4(Air Force Logistics Directorate)
- A4L(Abilities For Life)
- A-5(Air Force Plans Directorate)
- A99ID(Associates of the 99th Infantry Division)
- AA(anti-aircraft)
- A.A.(Augustiniani Assumptionis (Assumptionists))
