| Abbreviation | Definition |
|---|---|
| PRSI | Public Relations Society of India |
| PRSP | Public Relations Society of the Philippines |
| PRST | Public Relations Society of Tanzania |
| PS | Paleontological Society |
| PS | Philological Society |
| PS | Physiological Society |
| PS | Planetary Society |
| PS | Protein Society |
| PS | Psychometric Society |
| PS | Psychonomic Society |
| PSA | Pastel Society of America |
| PSA | Peace Studies Association |
| PSA | Phycological Society of America |
| PSA | Poetry Society of America |
| PSA | Political Studies Association |
| PSAE | Pennsylvania Society of Association Executives |
| PSAE | Philippine Society of Agricultural Engineers |
| PSAS | Portland State Aerospace Society |
| PSAS | Puget Sound Aquarium Society |
| PSBR | PA Society for Biomedical Research |