| Abbreviation | Definition |
|---|---|
| UXO | Unexploded Ordnance |
| UXO | Un-eXploded Ordnance |
| UXOCOE | Un-eXploded Ordnance Center Of Excellence |
| UXOS | UneXploded Ordnance |
| UXP | User eXperience Planning |
| UXS | Unmanned System |
| UXW | Un- eXploded Weapon |
| UYC-9 | Tactical Secure Data Communications system |
| UYH-16 | Mass Memory Storage Device |
| UYK-100 | Network Planning Terminal |
| UYK-20 | U.S. Navy standard 16-bit computer |
| UYK-43 | U.S. Navy standard 32-bit computer (replacement for UYK-7) |
| UYK-44 | U.S. Navy standard 16-bit computer (replacement for UYK-20) |
| UYK-7 | U.S. Navy standard 32-bit computer |
| UYK-70 | Standard 32-bit Naval processing computer (replaces the UYK-43) |
| UYM | Ulster Young Militants |
| UYQ | Uranium Yield Quantity |
| UYQ-70 | Advanced Display System |
| UYQ-76 | Maintenance Data Processing Station |
| UYR | Understanding Your Report |