| Abbreviation | Definition |
|---|---|
| PCRF | Planetary Coral Reef Foundation |
| PCRF | Public Cause Research Foundation |
| PCRI | Portland Community Reinvestment Initiatives |
| PCRI | Prostate Cancer Research Institute |
| PCRM | Physicians Committee for Responsible Medicine |
| PCRS | Pacific Coast Reproductive Society |
| PCS | Pancreatic Cancer Symposium |
| PCSA | Patrol Craft Sailors Association |
| PCT | Pacific Crest Trail |
| PCTA | Pacific Crest Trail Association |
| PCTF | Pardee Cancer Treatment Fund |
| PCTFE | Pacific Center of Thermal-Fluids Engineering |
| PCV | Peace Corps Volunteer |
| PCVC | Port Credit Volleyball Club |
| PCYA | Pennsylvania Children and Youth Administrators |
| PCYA | Presidential Classroom for Young Americans |
| PCYA | Progressive Conservative Youth Association |
| PCYAI | Presidential Classroom for Young Americans, Inc. |
| PCYC | Police-Citizens Youth Club |
| PDAI | Programa de Desarrollo Agropecuario Integrado |