| Acronym | Definition |
|---|
| UBR | Unspecified Bit Rate (ATM) |
| UBR | Universal Broadband Router |
| UBR | Unspecified Bit Rate |
| UBR | Uddi Business Registry |
| UBR | Universal Broadband Router (cable modems) |
| UBR | Ultimate Breakfast Round (trademark of Rich's Foodservice) |
| UBR | Universal Business Registry |
| UBR | University Boat Race (UK) |
| UBR | Undefined Bit Rate (ATM) |
| UBR | Ubiquitin-Protein Ligase E3 Component N-Recognin |
| UBR | Union of Belarus and Russia |
| UBR | Usage-Based Reading (software design inspections) |
| UBR | Unsatisfactory Business Relationship |
| UBR | Unfocused Boss Rambling |
| UBR | Unique Backup Requirement |