| Abbreviation | Definition |
|---|---|
| AASLT | Air Assault |
| AASM | Advanced Air-to-Surface Missile |
| AASM | Armement Air-Sol Modulaire |
| AASM | Australian Active Service Medal |
| AASP | Army Automation Security Program |
| AASPR | Army Aviation System Program Review |
| AASR | Advanced Airborne Surveillance Radar |
| AASS | Anti-Aircraft Searchlight Section |
| AAST | Army Aerial Scout Test |
| AAT | Advanced Armament Technology |
| AAT | America's Army Training |
| AAT | Automatic Analog Test |
| AAT | Automatic Analog Tester |
| AAT | Aviation Advisory Team |
| AAT | Aviation Applied Technology |
| AATADS | Advanced Antitank and Air Defense System |
| AATC | Australian Army Transportation Corps |
| AATCC | Amphibious Air Traffic Control Center |
| AATD | Aviation Applied Technology Directorate |
| AATT | Aegis Ashore Team Trainer |