| Abbreviation | Definition |
|---|---|
| TZM | Tommie Zito Monthly cyberletter |
| TZN | The Zelda Network |
| TZR | Teazer |
| TZT | Tallon Zek Times |
| TZW | Twilight Zone World |
| U | Uhf |
| U | Universal Pictures |
| U | Use |
| UA | Underground Access |
| UA | United Artists |
| UA | Update Australia |
| UAB | WUAB-TV, Channel 43, Cleveland, Ohio |
| UAC | United Artists Corporation |
| UAD | Universal Audio |
| UAP | Universal Advertisement Package |
| UAP | Universal Availability of Publications |
| UAR | Underground Access Remote |
| UAT | Urban America Television |
| UATN | Urban America Television Network |
| UBMS | United Broadcast and Media Solutions |