| Abbreviation | Definition |
|---|---|
| TWP | Thai Word Processor |
| TXA | Tachyon Cross Assembler |
| TXE | The XML Editor |
| TXS | tiny XML server |
| TXW | typed XML writer |
| TZX | TurboZIP Express |
| U | Uninstall |
| U4A | Ubuntu for Android |
| UAAP | Undergraduate Advising and Academic Programming |
| UAE | Ubiquitous Amiga Emulator |
| UAE | Unix Amiga Emulator |
| UAF | Microsoft Unrestricted Access Framework |
| UAI | Universal Apache Installation |
| UAP | Upgrade Advantage Program |
| UAS | Unicenter AutoSys Starter |
| UAS | Universal Accounting Software |
| UASIP | Unicenter AutoSys Starter Implementation Pack |
| UAT | User Acceptance Test |
| UAT | User Acceptance Testing |
| UAVS | Update Anti-Virus Software |