| Abbreviation | Definition |
|---|---|
| PRC | Parkinson's Research Center |
| PRC | Primate Rescue Center |
| PRC | Private Rights Clearinghouse |
| PRCI | Primate Rescue Center, Inc. |
| PRCNO | Preservation Resource Center of New Orleans |
| PRCS | Pakistan Red Crescent Society |
| PRCT | Puerto Rico Conservation Trust |
| PREC | Peterborough Racial Equality Council |
| PREF | Pacific Rim Education Foundation |
| PREN | Parenting Resource Education Network |
| PRIA | Participatory Research In Asia |
| PRIDE | Parent Resource Institute for Drug Education |
| PRLDEF | Puerto Rican Legal Defense and Education Fund |
| PRO | Public Research Organization |
| PROA | Pennsylvania Residential Owners Association |
| PROFOCA | Professional Foreign Correspondents Association |
| PRRAC | Poverty and Race Research Action Council |
| PRY | Project Reach Youth |
| PSBA | Puget Sound Book Artists |
| PSC | Pet Smart Charities |