| URR | Ugly Radio Rebellion 
| Others |
| URR | UHF (Ultra-High Frequency) Radio Receiver
| Others |
| URR | UHF Radio Receiver
| Others |
| URR | Ultima Ratio Regum
| Others |
| URR | Ultimate Recoverable Reserves
| Others |
| URR | Ultimately Recoverable Reserves
| Others |
| URR | Ultimately Recoverable Resource
| Others |
| URR | Un- Resourced Requirement
| Others |
| URR | Unconstrained Requirements Report
| Others |
| URR | Undergraduate Registration Requirement
| Others |
| URR | Underground Railroad Radio
| Others |
| URR | Unearned Revenue Reserve
| Others |
| URR | Unexpired Risk Reserve
| Others |
| URR | Uniface Runtime Repository
| Others |
| URR | Unified Rate Review
| Others |
| URR | Union Railroad Company ( Pittsburgh, Pennsylvania)
| Others |
| URR | Union Railroad Pittsburgh
| Others |
| URR | Universal Repair Rate
| Others |
| URR | University Research Review
| Others |
| URR | University Research Reviewer
| Others |
| URR | Unlimited Recycling Resources
| Others |
| URR | Upstream Regulatory Region
| Others |
| URR | Urea Reduction Ratio
| Others |
| URR | Urgent radiation reserves
| Others |
| URR | Urrao, Colombia
| Others |
| URR | Useful, Reliable, Relevant
| Others |
| URR | Usual Running Rate
| Others |