| Abbreviation | Definition |
|---|---|
| PCWS | Pakistan Christian Welfare Society |
| PDPS | Print Drawing and Photographic Society |
| PDS | Philippine Dermatological Society |
| PDSS | Painted Desert Sheep Society |
| PEAS | Program in Ecological Agriculture and Society |
| PECS | Programme on Ecosystem Change and Society |
| PEFS | Provincial Employee Fitness Society |
| PEFS | Provincial Employees Fitness Society |
| PEHS | Pauline Elizabeth Hopkins Society |
| PENSA | Parenteral and Enteral Nutrition Society of Asia |
| PEPS | Plumas Eureka Preservation Society |
| PERSIA | Political Economic Religion Society Intellectual And Aesthetics |
| PERSIA | Politics Economics Religion Society Intellectual and Artistic |
| PES | Philosophy of Education Society |
| PES | Power Energy Society |
| PES | Power Engineering Society |
| PESA | Philosophy of Education Society of Australasia |
| PETS | Perth Electric Tramway Society |
| PFAS | Perry Freshwater Appreciation Society |
| PFMS | Peterborough Folk Music Society |