| Abbreviation | Definition |
|---|---|
| UDCR | University of Dayton College Republicans |
| UDCS | University of Dublin Choral Society |
| UDD | Urban Development Department |
| UDE | University of Duisburg Essen |
| UDEA | University of Digital Economics and Agrotechnologies |
| UDEC | Universidad de Concepcion - Chile |
| UDEL | University of Delaware |
| UDEMY | University of Distance Education Effective Mostly Yourself. |
| UDEMY | University of Distance Education Mostly Yourself. |
| UDF | University Dissertation Fellowships |
| UDFSC | University of Delaware Figure Skating Club |
| UDG | Universidad de Guadalajara |
| UDI | University Diagnostic Institute |
| UDI | Urban Development Institute |
| UDIC | University Development and Innovation Council |
| UDIC | University of Dayton International Club |
| UDK | University Daily Kansan |
| UDL | Universitat de Lleida |
| UDLP | University Development Linkages Program |
| UDLP | University Development Linkages Project |