| Abbreviation | Definition |
|---|---|
| PRL | Plant Research Laboratory |
| PRL | Police Research Laboratory |
| PRL | Programming Research Laboratory |
| PRO | Peer-Review Organization |
| PRP-T | PolyribosyRibitol Phosphate conjugated with Tetanus toxoid |
| PRRL | Pediatric Retinal Research Laboratory |
| PSB | Protected Specimen Brush |
| PSBC | Puget Sound Blood Center |
| PSCL | Political Science Computational Laboratory |
| PSD | Protein S Deficiency |
| PSDL | Precision Systems Design Laboratory |
| PSDL | Primary standards dosimetry laboratories |
| PSG | Parkinson Study Group |
| PSG | PolySomnoGraph |
| PSI | Protein Structure Initiative |
| PSI | Pseudo-Stereo Imaging |
| PSKL | partner state key laboratory |
| PSL | Physical Science Laboratory |
| PSL | Polyhedral Structures Laboratory |
| PSLD | Polish Society of Laboratory Diagnostics |