PCA

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
 * Prostate cancer
 * 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

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
 * 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

 * People's Choice Awards, awards show where winners are voted on by the general public
 * Personal carbon allowance, for carbon dioxide emissions
 * Pete Crow-Armstrong, American baseball player
 * Prompt Corrective Action, US banking law