| Abbreviation | Definition |
|---|---|
| PICL | Permanent International Committee of Linguists |
| PICS | Philippine Internet Commerce Society |
| PII | Institution of Engineers, Indonesia |
| PII | Persatuan Insinyur Indonesia |
| PIMS | Production and Inventory Management Society |
| PIST | Paranormal Investigation Society of Toronto |
| PJCS | Pittsburgh Japanese Cultural Society |
| PJHS | Pilgrim John Howland Society |
| PJLS | Penang Japanese Language Society |
| PJM | Institution of Surveyors, Malaysia |
| PJM | Pertubuhan Juruukur Malaysia |
| PLATO | South African Council for Professional and Technical Surveyors |
| PLMS | Proceedings London Mathematical Society |
| PLMS | Proceedings of the London Mathematical Society |
| PLOT | Dutch Association for Environmental Technology |
| PLOT | Platform Omgevings Technologie |
| PLRS | Punjab Land Record Society |
| PLRS | Punjab Land Records Society |
| PMA | Philippine Medical Association |
| PMAI | Powder Metallurgy Association of India |