| PSEF | Paper Science and Engineering Foundation 
| Others |
| PSEF | Peninsula Schools Education Foundation
| Others |
| PSEF | Pennfield Schools Educational Foundation
| Others |
| PSEF | Philippine Solidarity Economy Forum
| Others |
| PSEF | Pico Ski Education Foundation
| Others |
| PSEF | Plateforme de Services aux Entreprises Ferroviaires
| Others |
| PSEF | Policy Social Engagement Fellowship
| Others |
| PSEF | Polson Scholarship and Education Foundation
| Others |
| PSEF | Propulsion Systems Evaluation Facility
| Others |
| PSEF | Public Safety Emergency Force
| Others |
| PSEF | Public Services Employers Forum
| Others |
| PSEF | Purdue Student Engineering Foundation
| Others |