| Abbreviation | Definition |
|---|---|
| PSIC | Professional Solutions Insurance Company |
| PSIP | Podlaskiego Systemu Informacji Przestrzennej |
| PSK | Pagano, Schenck, & Kay |
| PSL | Psychometric Services, Ltd. |
| PSLL | Plymouth Short Line Ltd |
| PSMCL | Pak Suzuki Motor Company Limited |
| PSMN | Picadio Sneath Miller Norton, P.C. |
| PSMN | Picadio Sneath Miller & Norton, P.C. |
| PSNC | Pacific Steam Navigation Company |
| PSNC | Puget Sound Navigation Company |
| PSNI | Professional Software for Nurses Inc |
| PSO | Pakistan State Oil |
| PSO | Professional Services Organization |
| PSO | Professional Standards Office |
| PSO | Public Service Company of Oklahoma |
| PSO | Public Service Of Oklahoma |
| PSP | Paintball Sports Promotions |
| PSP | Payment Service Provider |
| PSPCL | Punjab State Power Corporation |
| PSPCL | Punjab State Power Corporation Limited |