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