PCA
- Algerian Communist Party
- Communist Party of Andalusia
- Communist Party of Aragon
- Communist Party of Argentina
- Curling Alberta
- EU–Armenia Partnership and Cooperation Agreement
- Josep Torrellas
- List of police complaints authorities
- Lufkin, Texas
- POSC Caesar
- Packaging Corporation of America
- Parents and citizens
- Paris College of Art
- Parks Canada
- Partial combinatory algebra
- Partnership and Cooperation Agreement
- Patient-controlled analgesia
- Peanut Corporation of America
- Pennsylvania Central Airlines
- Pensacola Christian Academy
- People's Choice Awards
- Peoples Christian Academy
- Permanent Court of Arbitration
- Permanent change of assignment
- Personal carbon allowance
- Pete Crow-Armstrong
- Philippine Columbian Association
- Physical configuration audit
- Pineywoods Community Academy
- Plate count agar
- PokerStars Caribbean Adventure
- Polymerase cycling assembly
- Positive Coaching Alliance
- Posterior cerebral artery
- Posterior cortical atrophy
- Presbyterian Church in America
- Presbyterian Church of Africa
- Presbyterian Church of Australia
- Prestonwood Christian Academy
- Principal component analysis
- Procainamide
- Production Code Administration
- Professional Chess Association
- Professional Cricketers' Association
- Progressive Citizens of America
- Progressive Cultural Association
- Prompt Corrective Action
- Prostate cancer
- Protein-fragment complementation assay
- Protocatechuic acid
- Providence Christian Academy (disambiguation)
- Punjab Cricket Association
- Punjab Cricket Association Stadium
- Pyroglutamic acid
- Stochastic cellular automaton
- Zoey 101