| Acronym | Definition |
|---|
| PCR | Polymerase Chain Reaction (biology, biochemistry) |
| PCR | Pacific Region |
| PCR | Post-Consumer Recycled (Patagonia) |
| PCr | Phosphocreatine (biochemistry) |
| PCR | Post Conviction Relief |
| PCR | Program Clock Reference (DVB) |
| PCR | Partido Comunista Revolucionario (Argentina) |
| PCR | Peak Cell Rate |
| PCR | Property Condition Report |
| PCR | Passenger Car Radial (tires) |
| PCR | Parti Communiste Réunionnais (Communist Party of Reunion) |
| PCR | Principal Component Regression (multivariate regression technique) |
| PCR | Patient Care Report |
| PCR | Put/Call Ratio (investing) |
| PCR | Personne Compétente en Radioprotection (French: Person Competent in Radiation Protection) |
| PCR | Procurement Center Representative |
| PCR | Protein/Creatinine Ratio |
| PCR | Photochemical Reaction |
| PCR | Primary Charge Roller (computer printers) |
| PCR | Platform Configuration Register |
| PCR | Partidul Comunist Roman (Romanian Comunist Party) |
| PCR | Private Client Resources (Wilton, CT) |
| PCR | Program Change Request |
| PCR | Project Change Request |
| PCR | Prehospital Care Report (medicine/healthcare) |
| PCR | Port Control Register |
| PCR | Payload Changeout Room |
| PCR | Palestinian Centre for Rapprochement (est. 1998) |
| PCR | Pollution Control Revenue (bond) |
| PCR | Preventive Cyclic Retransmission |
| PCR | Product Change Request |
| PCR | Primary Care Rheumatology Society (UK) |
| PCR | Print Contrast Ratio |
| PCR | Publication Change Request |
| PCR | Pomeroy Computer Resources |
| PCR | Personnel Casualty Report (USMC) |
| PCR | Plug Control Register (IEC61883) |
| PCR | Problem Change Report |
| PCR | Post Completion Review |
| PCR | Portable Channel Representation |
| PCR | Primary Clock Reference |
| PCR | Pump, Circulating |
| PCR | Plant Control Room |
| PCR | Packet Channel Request |
| PCR | Physical Condition Report (commercial real estate) |
| PCR | Plastic Chip Carrier |
| PCR | Portable Computer Receptacle |
| PCR | Personal Computer Review |
| PCR | Potential Carrier Recovery |
| PCR | Pulse Compression Radar |
| PCR | Post Creative Rationalization |
| PCR | Peripheral Curve Radius (contact lens fitting) |
| PCR | Personal Computer Ruggedized |
| PCR | Pending Correspondence Report |
| PCR | Program Change Report |
| PCR | Per Copy Royalty |
| PCR | Part Change Request |
| PCR | Photo-Club Rouennais (Rouen, France) |
| PCR | Personal Clothing Request |
| PCR | Precision Control Relay |
| PCR | Plasma Centrifugal Reactor |
| PCR | Package Change Required |
| PCR | Pumped Condensate Return |
| PCR | Program Control Review |
| PCR | Processor Capacity Reservation |
| PCR | Platform Capability Roadmap (US Navy) |
| PCR | Plano-Convex Resonator |
| PCR | Prioritized Contention Resolution |
| PCR | Product Complaint Report |
| PCR | Program for Clubhouse Research |
| PCR | Partir O Côco A Rir (Portuguese: Break the Coconut Laughing; figure of speech) |
| PCR | Pastor-Church Relations (various locations) |
| PCR | Paint Chip Repair (vehicle repair) |
| PCR | Proteina C Reactiva (Spanish: C-Reactive Protein) |
| PCR | Protection of Civil Rights Act (India) |
| PCR | Power Change Request (US NASA) |
| pCR | Pathologic Complete Response (breast cancer) |
| PCR | Pacific Coast Regional Corp. (California) |