| PFAS | Partnership Firm Assessed as
| Others |
| PFAS | Pedestrian Friendly Alert System
| Others |
| PFAS | Penn Financial Aid Supplement
| Others |
| PFAS | Per and polyFluoroAlkyl Substances
| Others |
| PFAS | Per- and polyFluoroAlkyl Substances
| Others |
| PFAS | Perry Freshwater Appreciation Society
| Others |
| PFAS | Personal Fall Arrest System
| Others |
| PFAS | Personal Fall Arrest Systems
| Others |
| PFAS | Poly Fluorinated Alkyl Substances
| Others |
| PFAS | Potential False Alarm Source
| Others |
| PFAS | President's Fine Arts Series
| Others |
| PFAS | Professional Fire Alarm Systems
| Others |