sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| United Arab Republic (Egypt) | **** |
| Urban Adventure Racing | *** |
| Universal Asynchronous Receiver | *** |
| University of Arkansas | *** |
| Urban Area Reserve | *** |
| Utility Assessment Report | *** |
| Upper Air Route | *** |
| User Action Routine | ** |
| unexercised aged rats | ** |
| upper airway resistances | ** |
| upstream activation region | ** |
| upstream activator region | ** |
| urea appearance rate | ** |
| United Alliance of Races | ** |
| Upper Atmosphere Research | ** |
| Upper Airway Resistance | ** |
| Union of Armenians in Romania | ** |
| Unit Address Register | ** |
| Upper Austria Research | ** |
| Union Academic Representative | ** |
| Use as Required | ** |
| Unio Atletica Rubi | ** |
| Upper Advisory Route | ** |
| UNCITRAL Arbitration Rules | ** |
| University Accounts Receivable | ** |
| Ultras Askary Rabat | * |
| Upper Arkansas Recycling | * |
| urban affairs reviews | * |
| Usability Aspect Reports | * |
| United Against Racism | * |
| United Arab Republics | * |
| UNIT ATTENDANCE RECORD | * |
| Unit Attendance Reports | * |
| Uncollectable Accounts Receivable | * |
| Unit At Risk (insurance) | * |
| Utah Anarchism and Revolution | * |
| Utah Animal Resources | * |