| Abbreviation | Definition |
|---|---|
| UAS | United Auto Service |
| UAS | University Accounting Services, Llc. |
| UASC | United Arab Shipping Company |
| UASC | Universal Avionics Systems Corporation |
| UAT | Ultra Active Technology, Ltd. |
| UAT | United Auto & Truck, Inc. |
| UAT | Universal Aqua Technologies |
| UATA | United Auto Trades Association |
| UATABC | United Auto Trades Association of British Columbia |
| UATC | United Aircraft and Transport Corporation |
| UATC | Universal Asia Technology Company |
| UATW | Up Against The Wall |
| UAU | Umu Alor USA |
| UB | Ungermann Bass |
| UB | United Boards |
| UB | Universal Banner |
| UB | Universal Beam |
| UBA | United Benefit Advisors |
| UBB | Unique Baby Boutique |
| UBC | United Bat Control |