| Abbreviation | Definition |
|---|---|
| PCA | Professional Computer Association of Lebanon |
| PCCS | Pacific Coast Catalysis Society |
| PCCS | Pittsburgh Cleveland Catalysis Society |
| PCCS | Primary Care Cardiovascular Society |
| PCCSS | Plum Creek Shooting Society |
| PCDS | Philadelphia County Dental Society |
| PCDS | Primary Care Dermatology Society |
| PCES | Pacific Coast Entomological Society |
| PCES | Post Crash Economics Society |
| PCHS | Pennington County Historical Society |
| PCHS | Pennington County Historical Society's |
| PCHS | Pet Connection Humane Society |
| PCNS | Pacific Coast Numismatic Society |
| PCRS | Primary Care Respiratory Society |
| PCS | Philippine College of Surgeons |
| PCS | Philippine Computer Society |
| PCS | Professional Communication Society |
| PCSM | Prostate Cancer Society Malaysia |
| PCSO | Pacific Coast Society of Orthodontists |
| PCUS | Primary Care Urology Society |