| Abbreviation | Definition |
|---|---|
| PAN | Polish Academy of Sciences |
| PAO | Philippine Academy of Ophthalmology |
| PAPS | Portuguese American Postgraduate Society |
| PARDS | Peace Area Riding for the Disabled Society |
| PARS | Peel Animal Rescue Society |
| PARSA | Parasitological Society of Southern Africa |
| PARST | Philosophy And Religion Society of Thailand |
| PAS | Pakistan Academy of Sciences |
| PAS | Performing Arts Society |
| PAS | Pontifical Academy of Sciences |
| PAS | Pontificia Academia Scientiarum |
| PAS | Pontificia Accademia delle Scienze |
| PASC | Public Accountant Society of Colorado |
| PASCV | Pan American Society for Clinical Virology |
| PASH | Petroleum Accountants Society of Houston |
| PASIC | Percussive Arts Society International Conference |
| PASP | Publications of the Astronomical Society of the Pacific |
| PASPCR | PanAmerican Society for Pigment Cell Research |
| PASR | Photographic Arts Society of Roswell |
| PASSEY | Peaceful Advancement of Societies through Sciences Engineering and You |