| Abbreviation | Definition |
|---|---|
| ARTP | Army Reserve Teen Panel |
| ARTS | All Range Tactical Squadron |
| ARTS | ARrmy Training Study |
| ARTSIII | Automated Radar Tracking System, Version 3 |
| ARTU | Automatic Range Tracking Unit |
| ARTW | Aerospace Reconnaissance Technical Wing |
| ARTY | Artillery |
| ARTYMET | ARTillerY METeorological |
| ARU | Access/Relay Unit |
| ARV | Armed Robotic Vehicle |
| ARV | Armored Recovery Vehicle |
| ARVL | Armoured Recovery Vehicle Light |
| ARVN | Army of the Republic of Viet Nam |
| ARVN | Army of the Republic of VietNam |
| ARW | Army Ranger Wing |
| ARWS | Advanced Radar Warning System |
| AS | Access System |
| AS | Acquisition Strategy |
| AS | Aerial Surveillance |
| AS | Air Force Standard |