| Acronym | Definition |
|---|
| UDR | User Data Repository |
| UDR | Universita di Roma (Italian: University of Rome; Italy) |
| UDR | Ulster Defence Regiment |
| UDR | Udaipur, India (Airport Code) |
| UDR | Union des Démocrates pour la République (French: Union of Democrats for the Republic; 1971-1976; France) |
| UDR | Union for Democracy and Republic (Republic of the Congo) |
| UDR | Ultra Data Rate |
| UDR | UART Data Register |
| UDR | Universal Data Repository |
| UDR | Urgent Data Request |
| UDR | User Data Record |
| UDR | Union Démocratique Ruraliste (French: Ruralist Democratic Union; Brazil) |
| UDR | User Defined Report |
| UDR | Usage Detail Record (mobile IP network usage accounting) |
| UDR | Urban Desire Radio |
| UDR | Universal Data Representation |
| UDR | Underwriters Digital Research, Inc. |
| UDR | Upside Downside Ratio |
| UDR | User Desired Requirement |
| UDR | Undisclosed/Undiscovered Driver Report (insurance) |