| Abbreviation | Definition |
|---|---|
| PRC | Precision Racing Components |
| PRCF | Porsche Racing Club Finland |
| PRDA | Polish Racing Drivers Of America |
| PRED | Personal Record |
| PRI | Performance Racing Industry |
| PRN | Performance Racing Network |
| PROP | Professional Racing Outboard Performance |
| PRR | Pro Racing Research |
| PRS | Penske Racing South |
| PRS | Precision Race Services |
| PSER | Puget Sound Enduro Riders |
| PSMR | Puget Sound Multirotor Racing |
| PSR | Performance Suspension Racing |
| PSR | Power Stands Racing |
| PTCC | Peabody Terrace Children's Center |
| PTI | Produce Traceability Initiative |
| PTRA | Pro Tree Racers Association |
| PURE | Pinevilles Ultimate Racing Experience |
| PURE | Pineville's Ultimate Racing Experience |
| PWR | Pac West Racing |