| UCAS | Un-manned Combat Air System 
| Others |
| UCAS | Unione Concessionari Automobili Skoda
| Others |
| UCAS | Universal Conditional Access System
| Others |
| UCAS | Universial Conditional Access Systems
| Others |
| UCAS | Universities & Colleges Application System
| Others |
| UCAS | Universities and Colleges Admission Service
| Others |
| UCAS | Universities and Colleges Admissions Service
| Others |
| UCAS | Universities College Admission Service
| Others |
| UCAS | Universities Colleges Admission System
| Others |
| UCAS | University Center for Ambulatory Surgery
| Others |
| UCAS | University College of Applied Sciences
| Others |
| UCAS | University Colleges and Art Schools
| Others |
| UCAS | University of Calgary Actuarial Society
| Others |
| UCAS | University of Cosmetology Arts & Sciences
| Others |
| UCAS | Unmanned Combat Air System
| Others |
| UCAS | Unrepresented Criminal Appellants Scheme
| Others |
| UCAS | Utah County Academy of Sciences
| Others |
| UCAS | Uwa Car Appreciation Society
| Others |