| Abbreviation | Definition |
|---|---|
| TZH | TrizecHahn Corporation |
| TZM | Turisticka Zajdenica Mjesta |
| TZR | TimeZone Racing |
| TZT | ThreeZee Technology, Inc. |
| TZT | TZ Technology Pty, Ltd. |
| TZTI | ThreeZee Technology, Inc. |
| UA | United Airlines |
| UA | United Artists |
| UA | Unlimited Adventures |
| UAAI | Universal Advertising Associates Inc |
| UABC | United Aircraft Building Corporation |
| UAC | Union Aerospace Corporation |
| UAC | United Aerospace Corporation |
| UAC | United Africa Company |
| UAC | United Aircraft Corporation |
| UAC | United Asset Coverage, Inc. |
| UAC | Universal Air Cargo, PTY, LTD. |
| UAC | Universal Alloy Corporation |
| UACC | United American Capital Corporation |
| UACN | United Africa Company of Nigeria |