| Abbreviation | Definition |
|---|---|
| PRR | Pacific Rim Resources, Inc. |
| PRR | Pacific Rim Resources, Incorporated |
| PRR | Private Residence Resorts |
| PRS | Personal Relay Service |
| PRS | Premchand Roychand Sons |
| PRS | Private Recording Studio |
| PRSC | Progress Rail Services Corp |
| PRSH | Pittsburgh Radio Supply House |
| PRSI | Pasadena Refining System Inc |
| PRSI | Peabody Resident Services Inc |
| PRSI | Polymer Recovery Systems Inc |
| PRT | Pacific Regeneration Technologies |
| PRT | Precision Records And Tapes |
| PRTC | PEPSU Road Transport Corporation |
| PRTC | Pepsu Roadways Transport Corporation |
| PRTC | Pondicherry Road Transport Corporation |
| PRTC | Puerto Rico Telephone Company |
| PRTC | Punjab Road Transport Corporation |
| PRTC | Purple Rose Theatre Company |
| PRU | Productivity Resources Unlimited |