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 <!-- PCa https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6326857/ -->
  • 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
  • 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
  • Philippine Columbian Association, club focusing in tennis in the Philippines
  • 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
  • POSC Caesar Association, a standardization organization
  • Production Code Administration, a division of the Motion Picture Association
  • 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
  • Partial combinatory algebra, an abstraction of a model of computation in mathematical logic

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