| Abbreviation | Definition |
|---|---|
| ATU | Antenna Tuning Unit |
| ATU | Automated Translation Unit |
| ATV | Advanced Technology Vessel |
| ATV | Armored Transport Vehicle |
| ATV | Automatic Transmitter Verification |
| ATVS | Advanced Television Seeker |
| ATW | Advanced Tactics and Warfare |
| ATWG | Anti-Terrorism Working Group |
| AU | Analog Applique Unit |
| AUAE | Annual Under Armour Elite |
| AUBT | Army Undergraduate Bursary Technical |
| AUC | appropriate use criteria |
| AUDIT | Alcohol use disorder identification test |
| AUDIT | Army Uniform Data Inquiry Technique |
| AUDS | Anti-UAV Defense System |
| AUEL | Automated Unit Equipment List |
| AUF | Airborne Use of Force |
| AUG | Application User Group |
| AUG | Armee Universal Gewehr |
| AUG | Army Universal Gun |