PAC

PAC may refer to:

Military

Planned Amortization Class, a type of collateralized mortgage obligation
Price Activity chart, a type of stock chart used in the technical analysis of stocks

Padiglione d'Arte Contemporanea, a contemporary art museum in Milan, Italy
Public Archives of Canada, a predecessor organization of the Library and Archives Canada

Pacific Aerospace Corporation, an aircraft manufacturing company based in New Zealand
- P-750 XSTOL, a Turboprop skydive/utility/aerial application aircraft. Formally known as the PAC 750-XL.
- PAC Cresco, a Turboprop-engined aerial application aircraft
- PAC CT/4, a basic training aircraft made by Pacific Aerospace Corporation
- PAC Fletcher, a Piston-engined aerial-application aircraft
Pakistan Aeronautical Complex, a military aircraft manufacturing facility in Pakistan
Polar Air Cargo, a cargo airline based in Purchase, New York, US
Albrook "Marcos A. Gelabert" International Airport in Panama City, Panama (IATA code PAC)

Anti-Corruption Party (Partido Anti-Corrupción), a political party in Honduras
Armed Proletarians for Communism (Proletari Armati per il Comunismo), a former Italian far-left terrorist group
Pan Africanist Congress, a political party in South Africa
Partido Acción Ciudadana (disambiguation), several political parties in Latin America
Pedorthic Association of Canada
Peoples' Aman Committee, a criminal gang and welfare group associated with the Pakistan Peoples Party
Political action committee (PAC, plural "PACs"), an organization formed to contribute funds to influence the outcome of political elections in the United States
Political Affairs Committee (African Union), a committee in the African Union
Political Affairs Committee (British Guiana), a political party in British Guiana
Polish American Congress, a US national umbrella organization
Public Accounts Committee (India), a parliamentary committee in India that examines government accounts and considers the reports of the Comptroller and Auditor General
Public Accounts Committee (Malaysia), a parliamentary committee in the Malaysia and other Westminster systems responsible for overseeing government expenditures
Public Accounts Committee (United Kingdom), a parliamentary committee in the UK and other Westminster systems responsible for overseeing government expenditures
Public Affairs Committee (Malawi), a political organization in Malawi

Public Assistance Committee, the committees which replaced the workhouse in the United Kingdom as the main means of welfare provision

Perturbed angular correlation, discovered by Hans Frauenfelder
Plasma arc cutting
Polyaluminium chloride, a coagulant used in water treatment
Polycyclic aromatic compound, a class of organic compound
Porting Authorisation Code, a unique identifier which telephone network providers issue to a customer so they can port their number to another network
Probably approximately correct learning, in computer science
PAC field, in mathematics
Powdered activated carbon, used for example in electrochemical regeneration
Pseudo algebraically closed field, a field with geometric features, namely each variety over it has a rational point
Pure and Applied Chemistry, the official monthly journal of IUPAC

Certified Physician assistant, or pathologist assistant; see List of abbreviations for medical organisations and personnel
P1-derived artificial chromosome, in genomic research
Papular acrodermatitis of childhood, Gianotti-Crosti syndrome
Plasma aldosterone concentration, of aldosterone
Pre-anesthesia checkup
Premature atrial contraction, a type of premature heart beat or irregular heart beat or arrhythmia
Primary auditory cortex, a region of the brain
Proanthocyanidin, a type of flavanol
Pulmonary artery catheterization, the insertion of a catheter into a pulmonary artery
Port-a-Cath, a catheter under the skin that is connected to a vein

Pacifica Coin, see List of TCP and UDP port numbers
PACManager, an ssh client manager for Unix systems
Perceptual Audio Coding, an audio compression algorithm
Pin Array Cartridge, an integrated circuit packaging type
Probably approximately correct, a computational learning theory framework
Presentation–abstraction–control, a type of design pattern used in software engineering
Programmable Automation Controller, combines the industrial PC and programmable logic controller control with the flexibility of monitoring and calculation of a PC
Proxy auto-config, a web browser technology
PACcoin (People's Alternative Choice) a community driven successor to Bitcoin

Pennsylvania Athletic Conference, former name of the Colonial States Athletic Conference, a US NCAA Division III collegiate athletic conference
Pocket Athletic Conference, a high school athletic conference in Indiana, US
Presidents' Athletic Conference, a US NCAA Division III athletic conference of small private colleges

Adrian Neville (AKA Pac, born 1986), former ring name of British professional wrestler Benjamin Satterly now known as Neville
Pac (family), a noble family of the Grand Duchy of Lithuania
Tupac Shakur or Pac, 2Pac (1971–1996), American rapper and actor

Pan Asian Coalition, one of the two playable factions in the computer game Battlefield 2142
Parent-Adult-Child, a model in transactional analysis
Perfect authentic cadence, in music
Performing arts center, a multi-use performance space
Progressive Activity Coupe, a vehicle category/development idea by BMW
Providence Anime Conference, a former anime convention
Provincial Armed Constabulary, a title used by some State Armed Police Forces in India
Public Assistance Committees, great depression-era institutions to support the poor in Britain