# PAC

Pac or PAC may refer to:

## Aviation

* IATA code PAC Albrook "Marcos A. Gelabert" International Airport in Panama City, Panama
* Pacific Aerospace Corporation, New Zealand, manufacturer of aircraft:
** PAC 750XL
** PAC Cresco
** PAC CT/4
** PAC Fletcher
* Pakistan Aeronautical Complex, aerospace manufacturer
* Polar Air Cargo airline, Purchase, New York, US

## Commerce

* Panasonic Avionics Corporation, produces equipment and services for in-flight entertainment, etc.
* Peruvian Amazon Company, a former rubber company
* Planned Amortization Class, a type of collateralized mortgage obligation
* Programa de Aceleração do Crescimento, an investment plan in Brazil

## Education

* Panasonic Academic Challenge, a US national competition
* Postgraduate Applications Centre, Ireland
* Prince Alfred College, Australia
* Peres Academic Center, a private college in Israel

## Military

* Civil Defense Patrols (Patrullas de Autodefensa Civil), Guatemalan militia and paramilitary group
* Patriot Advanced Capability, of the MIM-104 Patriot missile
* Rapid Deployment Force (Malaysia), an armed forces unit

## People

* Pac (wrestler) (born 1986), English professional wrestler
* Pac (family), of the Grand Duchy of Lithuania
* Tupac Shakur or Pac, 2Pac (1971–1996), American rapper

## Politics

* Anti-Corruption Party (Partido Anti-Corrupción), Honduras
* Armed Proletarians for Communism (Proletari Armati per il Comunismo), a former Italian group
* Pan Africanist Congress, South Africa
* Partido Acción Ciudadana (disambiguation), several political parties in Latin America
* Peoples' Aman Committee, a criminal gang and welfare group associated with the Pakistan Peoples Party
* Political action committee, U.S. political fundraiser
* Political Affairs Committee (British Guiana)
* Polish American Congress
* Public Accounts Committee (India)
* Public Accounts Committee (Malaysia)
* Public Accounts Committee (United Kingdom)
* Public Affairs Committee (Malawi)

## Science and technology
### Biology and medicine

* Physician assistant, certified, commonly abbreviated in the USA as PA-C
* Plasma aldosterone concentration
* Post-abortion care
* Pre-anesthesia checkup
* Premature atrial contraction, a cardiac dysrhythmia
* Photoactivated adenylyl cyclase, a light-sensitive protein
* Proanthocyanidin, a type of flavanol
* Pulmonary artery catheterization

### Computing and industrial

* Pacifica Coin, see List of TCP and UDP port numbers#Registered_ports
* Perceptual Audio Coder, a lossy audio compression algorithm
* Pin Array Cartridge, an integrated circuit packaging type
* Probably approximately correct, in machine learning
* Presentation–abstraction–control, in software architecture
* Programmable Automation Controller; see Computer appliance
* Proxy auto-config, a web browser technology

### Other science and technology

* Perturbed angular correlation
* Polyaluminium chloride, less effective than aluminium chlorohydrate for water treatment
* Porting Authorisation Code, to transfer mobile phone numbers
* Pseudo algebraically closed field (PAC field), in mathematics
* Powdered activated carbon, used in electrochemical regeneration
* Pure and Applied Chemistry, the official monthly journal of IUPAC

## Sports

* Pennsylvania Athletic Conference, former name of the Colonial States Athletic Conference, an NCAA Division III collegiate athletic conference located in Pennsylvania, United States
* Pioneer Athletic Conference, a high school athletic conference located in Pennsylvania, United States
* Presidents' Athletic Conference, an NCAA Division III collegiate athletic conference located in the Appalachian region of the United States
* Pocket Athletic Conference, a high school athletic conference located in Indiana, United States

## Other uses

* Pac, Albania, a village in Bytyç, Albania
* Padiglione d'Arte Contemporanea, a museum in Milan, Italy
* Pan Asian Coalition, faction in the computer game Battlefield 2142
* Parent-Adult-Child, a model in transactional analysis
* Perfect authentic cadence, in music
* Performing arts center
* Providence Anime Conference, 2008
* Public assistance committee, former UK institutions for assisting the poor