| Acronym | Definition |
|---|
| PSSI➣Prague Security Studies Institute (Czech Republic) |
| PSSI➣Public Safety Solutions, Inc. (Chicago, IL) |
| PSSI➣Phosphorus, Sulfur and Silicon |
| PSSI➣Peninsula Sanitary Service, Inc. (Stanford, CA) |
| PSSI➣Puget Sound Sailing Institute (Washington) |
| PSSI➣Persatuan Sepak Bola Seluruh Indonesia (Football Association of Indonesia) |
| PSSI➣Performance Salary Step Increase |
| PSSI➣Perforated Screen Surfaces Incorporated (Conklin, NY) |
| PSSI➣Powertech Substation Services, Inc. (Manila, Philippines) |
| PSSI➣Primary Specialty Skill Identifier |