| Abbreviation | Definition |
|---|---|
| AAPPES | Army Automation Planning, Programming, and Evaluation System |
| AAPR | Army Aviation Program Review |
| AAPRSO | Army Aviation Personnel Requirements for Sustained Operations |
| AAPU | Australian Army Photographs Unit |
| AAR | After Action Report |
| AAR | Air To Air Refueling |
| AAR | All American Rejects |
| AAR | Army Artillery Reference |
| AAR | Association of American Railroads |
| AARA | Air-to-Air Refueling Area |
| AARC | Anderson U.S. Army Reserve Center, Troy, Alabama |
| AARD | Advanced Automotive Recovery Department |
| AARDAC | Army Air Reconnaissance for Damage Assessment in CONUS |
| AARL | Army Aeromedical Research Lab |
| AARL | Army Aeromedical Research Laboratory |
| AARM | Advanced Anti Radiation Missile |
| AARM | Asian Army Rifle Meet |
| AARS | Advanced Aerial Radiac System |
| AARS | Advanced Airborne Radar System |
| AARS | Advanced Airborne Radiac System |