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 The PAC P-750 XSTOL, (formerly known as the PAC 750XL) is a utility aircraft of conventional Aluminium, all-metal low-wing monoplane design, with fixed Tricycle gear, tricycle undercarriage. Combining the engine and wings of the PAC Cresco with ...

** PAC Cresco **

PAC CT/4 The Pacific Aerospace Corporation CT/4 Airtrainer series is an all-metal-construction, single-engine, two-place with side-by-side seating, fully aerobatic, piston-engined, basic training aircraft manufactured in Hamilton, New Zealand. History ...

PAC Fletcher 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 ...

Pakistan Aeronautical Complex The Pakistan Aeronautical Complex (PAC) is a major defense contractor and an aerospace manufacturer headquartered in Kamra, Punjab, Pakistan. The Pakistan Aeronautical Complex is one of the largest defense contractors in aerospace and milit ...

, aerospace manufacturer *

Polar Air Cargo Polar Air Cargo Worldwide Inc. is a cargo airline based in Purchase, New York, United States. It operates scheduled all-cargo services to North America, Asia, and Europe. Its main base is Cincinnati/Northern Kentucky International Airport, with ...

airline, Purchase, New York, US

Commerce

Panasonic Avionics Corporation Panasonic Avionics Corporation (PAC) designs, engineers, manufactures, sells and installs customized in-flight entertainment and communications devices to airlines worldwide. It is a subsidiary of Panasonic Corporation of North America, the prin ...

, produces equipment and services for in-flight entertainment, etc. *

Peruvian Amazon Company The Peruvian Amazon Company, also known as the Anglo-Peruvian Amazon Rubber Co., was a rubber boom company that operated in Peru during the late 1800s and early 1900s. Headquartered in Iquitos, it gained notoriety for its harsh treatment of In ...

, a former rubber company * Planned Amortization Class, a type of

collateralized mortgage obligation A collateralized mortgage obligation (CMO) is a type of complex debt security that repackages and directs the payments of principal and interest from a collateral pool to different types and maturities of securities, thereby meeting investor need ...

Programa de Aceleração do Crescimento The Programa de Aceleração do Crescimento (Growth Acceleration Program), better known as PAC, is a major infrastructure program of the Federal government of Brazil. The program was launched on January 28, 2007, by the Lula da Silva administr ...

, an investment plan in Brazil

Education

* Panasonic Academic Challenge, a US national competition *

Postgraduate Applications Centre {{primary sources, date=May 2008 Postgraduate Applications Centre (PAC) is an organisation that processes applications for large number of postgraduate courses in the Republic of Ireland. Institutions which currently accept applications through P ...

, Ireland *

Prince Alfred College Prince Alfred College is a private, independent, day school, day and boarding school for boys, located on Dequetteville Terrace, Kent Town, South Australia, Kent Town, near the Adelaide city centre, centre of Adelaide, South Australia. One of th ...

, 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 The MIM-104 Patriot is a mobile interceptor missile surface-to-air missile (SAM) system, the primary such system used by the United States Army and several allied states. It is manufactured by the U.S. defense contractor Raytheon and derives it ...

missile *

Rapid Deployment Force (Malaysia) The Malaysian Rapid Deployment Force (Abbreviation, Abbr.: RDF; ) is a rapid reaction force that to can be quickly deployed during an emergency (wartime or peacetime) usually via air or light land transport. Malaysia RDF has military and non-milita ...

, an armed forces unit

People

Pac (wrestler) Benjamin Satterley (born 22 August 1986), better known by his ring name Pac (sometimes stylised in ''all caps''), is an English professional wrestler. He is signed to All Elite Wrestling (AEW), where he is a member of Death Riders. He is a f ...

(born 1986), English professional wrestler *

Pac (family) The House of Pac or Pacowie (, , ) was one of the most influential noble families in the Polish–Lithuanian Commonwealth. Numerous high-ranking officials of the Commonwealth came from their ranks. Their coat of arms was Gozdawa. The famil ...

, of the Grand Duchy of Lithuania *

Tupac Shakur Tupac Amaru Shakur (; born Lesane Parish Crooks; June 16, 1971 – September 13, 1996), also known by his stage names 2Pac and Makaveli, was an American rapper and actor, regarded as one of the greatest and most influential rappers of all tim ...

or Pac, 2Pac (1971–1996), American rapper

Politics

Anti-Corruption Party The Anti-Corruption Party (, PAC) is a political party in Honduras Honduras, officially the Republic of Honduras, is a country in Central America. It is bordered to the west by Guatemala, to the southwest by El Salvador, to the southeast ...

(''Partido Anti-Corrupción''), Honduras *

Armed Proletarians for Communism Armed Proletarians for Communism (Italian ''Proletari Armati per il Comunismo'' or PAC) was an Italian far-left terrorist group founded in 1976 and disbanded three years later, during the " Years of Lead". History Armed Proletarians for Communis ...

(''Proletari Armati per il Comunismo''), a former Italian group *

Pan Africanist Congress The Pan Africanist Congress of Azania, often shortened to the Pan Africanist Congress (PAC), is a South African pan-Africanist national liberation movement that is now a political party. It was founded by an Africanist group, led by Robert So ...

, South Africa *

Partido Acción Ciudadana (disambiguation) Partido Acción Ciudadana may refer to: * Citizens' Action Party (Costa Rica) * Party for Citizen Action {{Disambig, political ...

, several political parties in Latin America *

Peoples' Aman Committee The Peoples' Aman Committee () was an alleged militant group tied to the Pakistan Peoples Party and based in Karachi, Pakistan. The PAC was founded by the infamous Karachi gangster Rehman Dakait in 2008 and is accused of being involved in organize ...

, a criminal gang and welfare group associated with the Pakistan Peoples Party *

Political action committee In the United States, a political action committee (PAC) is a tax-exempt 527 organization that pools campaign contributions from members and donates those funds to campaigns for or against candidates, ballot initiatives, or legislation. The l ...

, U.S. political fundraiser *

Political Affairs Committee (British Guiana) The Political Affairs Committee (PAC) was a political party in British Guiana. History The PAC was formed on 6 November 1946 by Cheddi Jagan, Janet Jagan, Ashton Chase and Jocelyn Hubbard.Polish American Congress The Polish American Congress (PAC) is an American umbrella organization of Polish-Americans and Polish-American organizations. Its members include individuals as well as fraternal, educational, veterans, religious, cultural, social, business, and ...

Public Accounts Committee (India) The Public Accounts Committee (PAC) is a committee of selected Member of parliament (India), members of parliament, constituted by the Parliament of India, for the purpose of auditing the revenue and the expenditure of the Government of India. The ...

Public Accounts Committee (Malaysia) The Public Accounts Committee (Malay language, Malay: ''Jawatankuasa Kira-Kira Wang Negara'') (PAC) is a select committee (parliamentary system), select committee of the Dewan Rakyat, House of Representatives in the Parliament of Malaysia. The PAC d ...

Public Accounts Committee (United Kingdom) The Committee of Public Accounts is a select committee of the British House of Commons. It is responsible for overseeing government expenditures, and to ensure they are effective and honest. The committee is seen as a crucial mechanism for e ...

* Public Affairs Committee (Malawi)

Science and technology

Biology and medicine

* Physician assistant, certified, commonly abbreviated in the USA as PA-C * Plasma

aldosterone Aldosterone is the main mineralocorticoid steroid hormone produced by the zona glomerulosa of the adrenal cortex in the adrenal gland. It is essential for sodium conservation in the kidney, salivary glands, sweat glands, and colon. It plays ...

concentration *

Post-abortion care Post-abortion care (PAC) is treatment and counseling for post-abortion women. It includes curative care, such as treating abortion complications, as well as preventative care, such as providing birth control to prevent future unwanted pregnancies. ...

Pre-anesthesia checkup Preanesthetic assessment (also called preanesthesia evaluation or pre-op evaluation) is a final medical evaluation conducted by an anesthesia provider before a surgery or medical procedure to ensure anesthesia can be administered safely. The anes ...

Premature atrial contraction Premature atrial contraction (PAC), also known as atrial premature complexes (APC) or atrial premature beats (APB), are a common arrhythmia characterized by premature heartbeats originating in the atria. While the sinoatrial node typically re ...

, a cardiac dysrhythmia *

Photoactivated adenylyl cyclase Photoactivated adenylyl cyclase (PAC) is a protein consisting of an adenylyl cyclase enzyme domain directly linked to a BLUF (blue light receptor using FAD) type light sensor domain. When illuminated with blue light, the enzyme domain becomes act ...

, a light-sensitive protein *

Proanthocyanidin Proanthocyanidins are a class of polyphenols found in many plants, such as cranberry, blueberry, and grape seeds. Chemically, they are oligomeric flavonoids. Many are oligomers of catechin and epicatechin and their gallic acid esters. More complex ...

, 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 Return-oriented programming (ROP) is a computer security exploit technique that allows an attacker to execute code in the presence of security defenses such as executable-space protection and code signing. In this technique, an attacker gains con ...

, an ARM security feature * Probably approximately correct, in machine learning *

Presentation–abstraction–control suario→ táctil + electroestática → ensorial→ ontrolador PAC↙ → resentación UI ↘ → bstracción QNN + lógica cuántica ↓ Cubo Cuántico ...

, in software architecture * Programmable Automation Controller; see

Computer appliance A computer appliance is a computer system with a combination of Computer hardware, hardware, software, or firmware that is specifically designed to provide a particular computing resource. Such devices became known as ''appliances'' because of ...

Proxy auto-config A proxy auto-config (PAC) file defines how web browsers and other user agents can automatically choose the appropriate proxy server (access method) for fetching a given URL. A PAC file contains a JavaScript function FindProxyForURL(url, host). ...

, a web browser technology

Other science and technology

Perturbed angular correlation The perturbed γ-γ angular correlation, PAC for short or PAC-Spectroscopy, is a method of nuclear solid-state physics with which magnetic field, magnetic and electric fields in crystal structures can be measured. In doing so, electrical field gra ...

* Polyaluminium chloride, less effective than

aluminium chlorohydrate Aluminium chlorohydrate is a group of water-soluble, specific aluminium salts having the general formula . It is used in cosmetics as an antiperspirant and as a coagulant in water purification. In water purification, this compound is preferred in ...

for water treatment *

Porting Authorisation Code Porting Authorization Code (PAC) is a unique identifier (normally 9 characters long and in the format "ABC123456") used by some mobile network operators to facilitate mobile number portability (MNP). This allows users to retain their mobile tele ...

, to transfer mobile phone numbers *

Pseudo algebraically closed field In mathematics, a field K is pseudo algebraically closed if it satisfies certain properties which hold for algebraically closed fields. The concept was introduced by James Ax in 1967.Fried & Jarden (2008) p.218 Formulation A field ''K'' is pseudo ...

(PAC field), in mathematics * Powdered activated carbon, used in

electrochemical regeneration The electrochemical regeneration of activated carbon based adsorbents involves the removal of molecules adsorbed onto the surface of the adsorbent with the use of an electric current in an electrochemical cell restoring the carbon's adsorptive capa ...

* ''

Pure and Applied Chemistry ''Pure and Applied Chemistry'' is the official journal for the International Union of Pure and Applied Chemistry (IUPAC). It is published monthly by Walter de Gruyter Walter de Gruyter GmbH, known as De Gruyter (), is a German scholarly publ ...

'', the official monthly journal of IUPAC

Sports

* Pennsylvania Athletic Conference, former name of the

Colonial States Athletic Conference The Colonial States Athletic Conference (CSAC) was an NCAA Division III collegiate athletic conference in the Mid-Atlantic United States that existed from 1992 to 2023. There were nine full member institutions when the conference. The conferenc ...

, an NCAA Division III collegiate athletic conference located in Pennsylvania, United States *

Pioneer Athletic Conference The Pioneer Athletic Conference (PAC) is a high school athletic conference with 12 members. The conference' is affiliated with the Pennsylvania Interscholastic Athletic Association (PIAA) and all participating school districts are located within th ...

, a high school athletic conference located in Pennsylvania, United States *

Presidents' Athletic Conference The Presidents' Athletic Conference (PAC) is an intercollegiate athletic conference which competes in the NCAA's Division III. Of its 11 member schools, all private, liberal arts institutions of higher learning, nine are located in Western Penn ...

, 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 Pac is a village located in the administrative territorial entity of Bytyç, belonging to the municipality of Tropojë, in northern Albania Albania ( ; or ), officially the Republic of Albania (), is a country in Southeast Europe. It i ...

, a village in Bytyç, Albania *

Padiglione d'Arte Contemporanea The Padiglione d'Arte Contemporanea or PAC is a List of contemporary art museums, museum of contemporary art in Milan, Italy. It is on via Palestro, next to the Galleria d'Arte Moderna (Milan), Galleria d'Arte Moderna, and across from the Giardin ...

, a museum in Milan, Italy * Pan Asian Coalition, faction in the computer game ''

Battlefield 2142 ''Battlefield 2142'' is a 2006 first-person shooter game developed by DICE and published by Electronic Arts. It is the fourth game in the ''Battlefield'' series. ''Battlefield 2142'' is set in 2142, depicting a war known as "The Cold War of t ...

'' * Parent-Adult-Child, a model in transactional analysis *

Perfect authentic cadence In Western musical theory, a cadence () is the end of a phrase in which the melody or harmony creates a sense of full or partial resolution, especially in music of the 16th century onwards.Don Michael Randel (1999). ''The Harvard Concise Dict ...

, in music *

Performing arts center Performing arts center/centre (see spelling differences), often abbreviated as PAC, is usually a complex housing performance spaces for various performing arts, including dance, music, and theatre. In some cases it refers to a single multi-use s ...

* Providence Anime Conference, 2008 *

Public assistance committee A public assistance committee (PAC), in the UK, was a body locally created after the abolition of the boards of guardians in 1930 by the Local Government Act 1929, when their powers and responsibilities for poor relief were passed to county and c ...

, former UK institutions for assisting the poor