| Abbreviation | Definition |
|---|---|
| TY | Then Year |
| TYG | Thank You Gift |
| TYP | Ten Year Plan |
| TYP | Type |
| TZ | Tax Zombie |
| TZE | Total Zone Exclusion |
| U | Uncompromising |
| U | Unsigned |
| U | Urgent |
| U.S.C. | United States Code |
| UA | Unified Agenda |
| UAM | Un- Addressed Mail |
| UART | Universal Asynchronous Receiver/ Transmitter |
| UAW | United Against Workers |
| UBB | Under Big Brother |
| UBB | Universal Bulletin Board |
| UBC | Uniform Building Code |
| UBC | Universal Background Checks |
| UBE | Unsolicited Bulk E-mail |
| UC | the Uper Chamber |