PCA may refer to: Medicine and biology Patient-controlled analgesia Plate count agar in microbiology Polymerase cycling assembly, for large DNA oligonucleotides Posterior cerebral artery Posterior cortical atrophy, a form of dementia Protein-fragment complementation assay, to identify protein–protein interactions Protocatechuic acid, a phenolic acid. Personal Care Assistant, also known as unlicensed assistive personnel Procainamide Military and government EU-Armenia Partnership and Cooperation Agreement (PCA agreement between Armenia and the EU) Parks Canada Agency Partnership and Cooperation Agreement (EU) Permanent change of assignment in US armed forces Organizations Business Packaging Corporation of America Peanut Corporation of America, former company Pennsylvania Central Airlines 1936-1948 Education Pacific Coast Academy, fictional school in TV series Zoey 101 Parents and citizens associations for schools in Australia Paris College of Art Pensacola Christian Academy, Florida, US Peoples Christian Academy, Toronto, Ontario, Canada Pineywoods Community Academy, a charter school district in Lufkin, Texas Plano Christian Academy Prestonwood Christian Academy, Plano, Texas Providence Christian Academy (disambiguation), for multiple schools Games PokerStars Caribbean Adventure, European Poker Tour event Professional Chess Association, from 1993 to 1996 Political parties Parti Communiste Algérien (Algerian Communist Party) Partido Comunista de Andalucía (Communist Party of Andalusia) Partido Comunista de Aragón (Communist Party of Aragon) Partido Comunista de la Argentina (Communist Party of Argentina) Religion Presbyterian Church of Africa Presbyterian Church in America Presbyterian Church of Australia Sports Peace Curling Association, the regional governing body for the sport of curling in the Peace River region of Northern Alberta prior to 2018 Positive Coaching Alliance, US, provides sports training workshops Professional Cricketers' Association, England and Wales Punjab Cricket Association Punjab Cricket Association Stadium, Mohali, India Other Permanent Court of Arbitration, The Hague, Netherlands Several Police complaints authorities Porsche Club of America POSC Caesar Association, a standardization organization Predator Conservation Alliance, Bozeman, Montana, US Production Code Administration, a division of the Motion Picture Association of America Progressive Citizens of America Progressive Cultural Association, a British political music group Science and technology para-Chloroamphetamine or 4-Chloroamphetamine Principal component analysis, a statistical procedure Printed circuit assembly or printed circuit board Probabilistic cellular automaton (Math/Stochastic Processes) Protocatechuic acid, a polyphenol antioxidant Pyroglutamic acid, an amino acid derivative Computers Physical configuration audit, in configuration management Polymorphous Computer Architectures, a DARPA project; see Josep Torrellas Other uses Personal carbon allowance, for carbon dioxide emissions Prompt Corrective Action, US banking law