# 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

## 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
* 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 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