| Abbreviation | Definition |
|---|---|
| UPI | United Press International |
| UPN | Ultra Pok Network |
| UPS | United Pop Stars |
| UPS | Universal Player System |
| UPSB | Universal Pen Spinning Board |
| UQI | Urban Quality Indicators newsletter |
| UQW-477 | Mannix Roadster - Customized 425 1966 convertible Oldsmobile Toronado |
| URH | Ultra Rare Hologram |
| URH | University Radio Hilo |
| URL | Under Rolling Lights |
| URM | Urban Renewal Media |
| URM | Urban Research Monitor |
| URN | Ultimate Read News |
| URN | University Radio Nottingham |
| URR | UHF Radio Receiver |
| URTNA | Union de Radiodiffusion et Télévision Nationale en Afrique |
| US | User Story |
| USAT | USA Today Newspaper |
| USB | Universal Studio Bridge |
| USB | Universal Style Bank |