| PRR | Pacific Rim Resources, Incorporated 
| Others |
| PRR | Packet Reception Ratio
| Others |
| PRR | Painting Red Rhinos
| Others |
| PRR | Parietal Reach Region
| Others |
| PRR | Parts Replacement Request
| Others |
| PRR | Pathogen Recognition Receptor
| Others |
| PRR | Pattern Recognition Receptor
| Others |
| PRR | Pattern Recognition Receptors
| Others |
| PRR | Pattern Recognition Receptory
| Others |
| PRR | Pennsylvania RailRoad
| Others |
| PRR | Pennsylvania Railroad (Norfolk Southern)
| Others |
| PRR | Pennsylvania RailRoad (now ConRail)
| Others |
| PRR | Peoples Republic of Romania
| Others |
| PRR | Perfect Resume
| Others |
| PRR | Perfect Resume data file (Perfect Resume)
| Others |
| PRR | Peripheral Ring Road
| Others |
| PRR | Personnel Requirements Report
| Others |
| PRR | Physical Resistance Rating
| Others |
| PRR | Pleasant Run Run
| Others |
| PRR | Plymouth Road Runner
| Others |
| PRR | Podiatry Residency Resource
| Others |
| PRR | Policies Regulations and Rules
| Others |
| PRR | Policy Research Report
| Others |
| PRR | Polycarbonate Replacement Resin
| Others |
| PRR | Posting Rules Read
| Others |
| PRR | Preclinical Reproducibility and Robustness
| Others |
| PRR | Preemptive Restart And Resample
| Others |
| PRR | Preliminary Requirements Review
| Others |
| PRR | Preventative Resin Restoration
| Others |
| PRR | Preventive Resin Restoration
| Others |
| PRR | Preview Read Recall
| Others |
| PRR | Preview, Read, and Recall
| Others |
| PRR | Print Request Router
| Others |
| PRR | Prison Releasee Reoffender
| Others |
| PRR | Private Residence Resorts
| Others |
| PRR | Pro Racing Research
| Others |
| PRR | Problem Reporting And Resolution
| Others |
| PRR | Problem Resolution Report
| Others |
| PRR | Product Release Request
| Others |
| PRR | Product Risk Rating
| Others |
| PRR | Production Readiness Review
| Others |
| PRR | Production Revision Record
| Others |
| PRR | Production Rule Representation
| Others |
| PRR | Program Requirements Review
| Others |
| PRR | Project Renovation Requisition
| Others |
| PRR | Proportional Rate Reduction
| Others |
| PRR | Pulse Rate Repetition
| Others |
| PRR | Pulse Repetition Rate
| Others |
| PRR | Pure Rock Report
| Others |