| Abbreviation | Definition |
|---|---|
| PSSE | Philippine Society of Sanitary Engineers |
| PSSI | Python Software Society of India |
| PSSL | Photographic Society of Sri Lanka |
| PSSO | Polish Society of Surgical Oncology |
| PSSS | Polish Soil Science Society |
| PSST | Pastel Society of Southeast Texas |
| PSTD | Philippine Society for Training and Develoment |
| PSTD | Philippine Society for Training and Development |
| PSW | Pharmacy Society Of |
| PSW | Pharmacy Society of Wisconsin |
| PSW | Philosophical Society of Washington |
| PSWC | Pastel Society of the West Coast |
| PSWS | Patiala Social Welfare Society |
| PsySSA | Psychological Society of South Africa |
| PSZ | Pharmaceutical Society of Zimbabwe |
| PT | Professional Technologists |
| PTE | Polish Economic Society |
| PTE | Polskie Towarzystwo Ekonomiczne |
| PTG | Pomorskie Towarzystwo Genealogiczne (Polish: Pomeranian Genealogical Society) |
| PTI | Polish Informaticians Society |