| Abbreviation | Definition |
|---|---|
| A3 | Armor/ Anti-Armor |
| A-3 | Air Force Operations Directorate |
| A3MP | Armor/ Anti-Armor Master Plan |
| A-4 | Air Force Logistics Directorate |
| A4I | Advanced Algorithms, Autonomy, and Artificial Intelligence |
| A-5 | Air Force Plans Directorate |
| AA | Abbreviated Analysis |
| AA | Accreditation Authority |
| AA | Administrative Assistant |
| AA | Affordability Analysis |
| AA | Air Ambulance |
| AA | Air To Air |
| AA | Algorithmic Architecture |
| AA | Allied Affairs |
| AA | Always Aground |
| AA | Always Available |
| AA | America's Army |
| AA | Anchor Assembly |
| AA | Anti Aircraft |
| AA | AntiAircraft |