| PSSA | PA State Snowmobile Association 
| Others |
| PSSA | Pacific Singlehanded Sailing Association
| Others |
| PSSA | Palm Springs Safe Access
| Others |
| PSSA | Particular Sensitive Sea Area
| Others |
| PSSA | Particularly Sensitive Sea Area
| Others |
| PSSA | Particularly Sensitive Sea Areas
| Others |
| PSSA | Party for Stressed Students in April
| Others |
| PSSA | Payload Support Structural Assembly
| Others |
| PSSA | Pegasus Slowpitch Softball Association
| Others |
| PSSA | Pennsylvania Skeet Shooting Association
| Others |
| PSSA | Pennsylvania Standardized School Assesment
| Others |
| PSSA | Pennsylvania State Snowmobile Association
| Others |
| PSSA | Pennsylvania State Sportsmen's Association
| Others |
| PSSA | Pennsylvania State Standard Assesment
| Others |
| PSSA | Pennsylvania System for School Assessment
| Others |
| PSSA | Pennsylvania System of School Assessment
| Others |
| PSSA | Pennsylvania System Of Schools Assessment
| Others |
| PSSA | Pennsylvania System of State Assessments
| Others |
| PSSA | Pennsylvsnia System State Assesments
| Others |
| PSSA | Persatuan Sepakbola Seluruh Asahan
| Others |
| PSSA | Pharmaceutical Society Of South Africa
| Others |
| PSSA | Philosophy Society Of Southern Africa
| Others |
| PSSA | physica status solidi a
| Others |
| PSSA | Political Science Student Association
| Others |
| PSSA | Political Science Students Association
| Others |
| PSSA | Pork Sausage and Scrapple Association
| Others |
| PSSA | Post Secondary Scholarship Administration
| Others |
| PSSA | Power Scale Soaring Association
| Others |
| PSSA | Preliminary System Safety Assessment
| Others |
| PSSA | Premium Site Support Agreement
| Others |
| PSSA | Presidents Social Service Award
| Others |
| PSSA | Primary School Sports Association
| Others |
| PSSA | Primary Schools Sports Association
| Others |
| PSSA | Program Static Storage Area
| Others |
| PSSA | Protein Sequence Structure Analysis
| Others |
| PSSA | Proteins Secondary Structure Analyses
| Others |
| PSSA | Pssaphysiology Society Of Southern Africa
| Others |
| PSSA | Public Schools Sport Association
| Others |
| PSSA | Public Schools Sporting Association
| Others |
| PSSA | Public Service Superannuation Act
| Others |
| PSSA | Puget Sound Swim Association
| Others |
| PSSA | Purdue Student Society of Arboriculture
| Others |