| Abbreviation | Definition |
|---|---|
| PFRS | Pristine Faith Restoration Society |
| PFS | Philadelphia Film Society |
| PFS | Philadelphia Folksong Society |
| PFSA | Portuguese Fraternal Society of America |
| PGES | Pakistan Geotechnical Engineering Society |
| PGRS | Pittsburgh Garden Railway Society |
| PGS | Pennsylvania German Society |
| PGS | Pittsburgh Geological Society |
| PGS | Purdue Geotechnical Society |
| PGSCA | Polish Genealogical Society of California (est. 1989) |
| PGSM | Polish Genealogical Society of Michigan |
| PGSS | Post Graduate Student Society |
| PGST | Polish Genealogical Society of Texas |
| PHAS | Pueblo Historical Aircraft Society |
| PHS | Pasadena Humane Society |
| PHS | Peninsula Humane Society |
| PHS | Philadelphia Horticultural Society |
| PHS | Printing Historical Society |
| PICL | Comit International Permanent des Linguistes |
| PICL | Comité International Permanent des Linguistes |