| Perioperative Clinical Research Committee | Academic & Science |
| Pacific Coast Research Conference | Academic & Science |
| Post Conflict Research Center | Academic & Science |
| Panama Canal Railway Company | Business |
| Pacific Concerns Resource Centre | Business |
| Portage Community Revitalization Corporation | Community |
| Park Crossing Recreation Club | Community |
| Pirates Cove Race Club | Community |
| Pottstown Cluster of Religious Communities | Community |
| Planned Conservation Residential Community | Community |
| Pryor Creek Recreation Center | Community |
| Post Consumer Recycled Content | General |
| Pacific Coast Rover Club | General |
| Primary Care Resource Centers | General |
| Pigeon Control Resource Centre | General |
| Providence Crisis Recovery Center | General |
| Pipeline Compressor Research Council | Governmental |
| Police Community Relations Committee | Governmental |
| Police Community Relations Council | Governmental |
| Peninsula Conflict Resolution Center | Governmental |
| Police Criminal Record Certificate | Governmental |
| Police Criminal Records Check | Governmental |
| Pierce County Regional Council | Governmental |
| Pinal County Republican Committee | Governmental |
| Physician Clinical Registry Coalition | Medical |
| Primary Care Resource Center | Medical |
| Pancreatic Cancer Research Center | Medical |
| Pacific Cancer Research Consortium | Medical |
| Primary Care Resource Centre | Medical |
| Pediatric Clinical Research Center | Medical |
| Parent Child Resource Center | Medical |
| Palliative Care Research Cooperative | Medical |
| Penn Center for Rehabilitation and Care | Medical |
| Primary Care Research Consortium | Medical |
| Panama Canal Railway (Kansas City Southern Railway) | Regional |
