| Abbreviation | Definition |
|---|---|
| UMU | University of Manchester Union |
| UMY | University of Muhammadiyah Yogyakarta |
| UMZ | University of Mazandaran |
| UN | The Uniformity Of Nature |
| UN | University of Nebraska |
| UNA | Universities And A |
| UNA | University Network Access |
| UNA | University of North Alabama |
| UNAB | Universidad Andrés Bello (Chile) |
| UNAB | Universidad Autónoma de Bucaramanga (Colombia) |
| UNAB | University of Agriculture, Abeokuta. |
| UNACR | Universidad Nacional de Costa Rica |
| UNAD | Universidad Nacional Abierta y a Distancia (Colombia) |
| UNAM | Universidad Nacional Autónoma de México |
| UNAM | Universidad Nacional Autonoma Mexicana |
| UNamur | Université de Namur |
| UNB | Universidade de Brasília |
| UNB | University of New Brunswick |
| UNBC | University of Northern British Columbia |
| UNC | University Of No Class |