| Abbreviation | Definition |
|---|---|
| URC | Utility Reference Custom |
| URD | User Report Designer |
| URF | Unified Renderer Family |
| URF | User Request Form |
| URM | User Reference Memos |
| URN | Uniform Resource Name |
| URNC | Uniform Random Network Coding |
| URP | User Role Profile |
| URPC | Up and Running Personal Computer |
| URPF | User-provided Routine to Process Functions |
| URPM | Universally Related Popup Menus |
| URS | Unique Recording Software |
| URSA | Universal Resource Sharing Application |
| URT | Utah Raster Toolkit |
| URTLS | Unified Real Time Location Solutions |
| URTLS | Unified Real Time Location System |
| USAC | Unified Speech and Audio Coding |
| USAM | Unix Style Access Method |
| USB | Ultimate Sound Bank |
| USBAT | User Should Be Able To |