| Abbreviation | Definition |
|---|---|
| PMASA | Powder Metallurgy Association of South Africa |
| PMES | Penfield Model Engineers Society |
| PMES | Pietermaritzburg Model Engineering Society |
| PMES | Port Moody Ecological Society |
| PMOS | Paisley Musical and Operatic Society |
| PMOS | Portland Metro Optometric Society |
| PMPS | Penang Medical Practitioners Society |
| PMRS | Palestinian Medical Relief Society |
| PNA | Philippine Neurological Association |
| PNPS | Pennsylvania Native Plant Society |
| PNS | Peripheral Nerve Society |
| PNWPSA | Pacific Northwest Political Science Association |
| POADS | Paignton Operatic And Dramatic Society |
| POFAS | Philippine Orthopaedic Foot and Ankle Society |
| POGS | Philippine Obstetrical and Gynecological Society |
| PPA | Pakistan Pediatric Association |
| PPA | Philippine Psychiatric Association |
| PPHS | Penn Public Health Society |
| PPHS | Pre Professional Health Society |
| PPLS | Policy Planning Law and Society |