| Abbreviation | Definition |
|---|---|
| PRB | Physics Research Building |
| PRC | Photometry, Radiometry, and Calorimetry |
| PRC | Pressure Regulator Control |
| PRDT | Physical Restraint Decision Tree |
| PRE | Proportional Reduction of Error |
| PRESS | Pacific Range Electromagnetic Signature Studies |
| PRL | Physics Resource Lab |
| PRO | Precision Residue Opener |
| PRPD | Phase-Resolved Partial Discharge |
| PRPDA | Phase Resolved Partial Discharge Analysis |
| PS | physics of sports |
| PSA | Pressure Swing Absorption |
| PSC | Phase Space Contraction |
| PSDA | Particle Size Distribution Analyzer |
| PSEM | Point Source Electron Microscope |
| PSF | Pound per square foot |
| PSI | Pound per square inch |
| PSIG | Pounds per Square Inch, Gauge |
| PSIT | Physics Society of IISER TVM |
| PSJ | Pivoted Shoe Journal |