| Abbreviation | Definition |
|---|---|
| UAPTF | Unidentified Aerial Phenomena Task Force |
| UAR | Unconventional Assisted Recovery |
| UAR | Unforecasted Ammunition request |
| UAR | Universal Army Rifle |
| UARCC | Unconventional Assisted Recovery Coordination Cell |
| UARM | Unconventional Assisted Recovery Mechanism |
| UARS | Ultra Accurate Rifle Stock |
| UARS | Underwater Acoustic Recognition System |
| UARS | Unmanned Aerial Reconnaissance System |
| UART | Unconventional Assisted Recovery Team |
| UART | Universal Asynchronous Receiver/Transmitter |
| UARV | Unmanned Airborne Reconnaissance Vehicle |
| UAS | Unmanned Aircraft System |
| UAT | Union Army of Tennessee |
| UAT | User Acceptance Test |
| UAT | User Acceptance Testing |
| UATC | Underwater Acoustics Technical Committee |
| UATD | Unit Adventurous Training Directive |
| UATD | Unmanned Aircraft Traffic Display |
| UAV | Unmanned Aerial Vehicle |