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:
 - 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
 - Pointer Authentication Code, an ARM security feature
 - 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, a body in the UK for assisting the poor between 1930 and 1940
 
See also
- Pac-12 Conference (Pac-12), a US college athletic conference
 - Pac-Man (disambiguation)
 - Public Affairs Council (disambiguation)