| UDR | Definition Routines 
| Others |
| UDR | The UD Registry, Inc.
| Others |
| UDR | UART Data Register
| Others |
| UDR | UdaipUr, Indonesia
| Others |
| UDR | Ulster Defence Regiment
| Others |
| UDR | Ultimate Desert Racer
| Others |
| UDR | Undergraduate Departmental Representative
| Others |
| UDR | Undergraduate Departmental Representatives
| Others |
| UDR | Uniao Democratica Ruralista
| Others |
| UDR | Unified Detail Record
| Others |
| UDR | Union Democracy Review
| Others |
| UDR | Union for the Defence of the Republic
| Others |
| UDR | Union of Democrats for the Republic
| Others |
| UDR | Unique Distance Restraint
| Others |
| UDR | Unit Decay Rate
| Others |
| UDR | United Dance Resource
| Others |
| UDR | Univariate Distribution Relationships
| Others |
| UDR | Universal Data Repository
| Others |
| UDR | Universal Data Representation
| Others |
| UDR | Universal Drill Rigs
| Others |
| UDR | Unlimited Desert Racer
| Others |
| UDR | Unplanned Deviation Report
| Others |
| UDR | Unrestricted Dynamic Range
| Others |
| UDR | Untethered Dead Reckoning
| Others |
| UDR | Up Down Roll
| Others |
| UDR | Update and Delete Record
| Others |
| UDR | Upside Downside Ratio
| Others |
| UDR | Urban Defense Rifle
| Others |
| UDR | Urbanization Development Region
| Others |
| UDR | Usage Detail Record
| Others |
| UDR | User Data report
| Others |
| UDR | User Data Request
| Others |
| UDR | User Defined Report
| Others |
| UDR | User Defined Routes
| Others |
| UDR | User Defined Routing
| Others |
| UDR | User Desired Requirement
| Others |
| UDR | Utah Dispute Resolution
| Others |
| UDR | UTS Dispute Resolution Interest Group
| Others |