| Abbreviation | Definition |
|---|---|
| UMQ-12 | Mini- Rawin System |
| UMQ-13 | MARK IVB Meteorological Data Station |
| UMR | Unit Mail Room |
| UMR | Unit Manning Report |
| UMS | Under Main Sight |
| UMS | Unit Medical Service |
| UMS | Use Map Settings |
| UMS | UTACCS Message System |
| UMT | Unit Maintenance Team |
| UMT | Unit Ministry Team |
| UMTC | United Marine Training Center |
| UMV | Un Manned Vehicle |
| UMVC | Ulster Military Vehicle Club |
| UMW | Ultra- MicroWave |
| UMW | Ultra-MicroWave |
| UNAAF | UNified Action Armed Forces |
| UNAMIR | United Nations Assistance Mission In Rwanda |
| UNAS | Universal Network Architecture Services |
| UNC | United Nations Command |
| UNCLOS | United Nations Convention on the Law Of the Sea |