# AB

AB, Ab, or ab may refer to:

## Arts and media

* American Bandstand, a music-performance television show
* Analecta Bollandiana, an academic journal
* Ancienne Belgique, a concert hall in Brussels, Belgium

## Business
### Business terminology

* Akcinė bendrovė, Lithuanian equivalent of an S.A. corporation
* Aktiebolag, Swedish for "corporation", similar to AG, Ltd or Inc

### Businesses

* A & B High Performance Firearms, a defunct sporting firearms manufacturer
* AB Airlines, a defunct British airline
* AB Groupe, a French broadcasting group
* Activision Blizzard, American holding company for Activision and Blizzard Entertainment
* Air Berlin (former IATA airline code AB), a former airline operating 1978–2017
* Alderson-Broaddus College, a liberal-arts college in West Virginia, US
* Alfa-Beta Vassilopoulos, a Greek supermarket chain
* Allen-Bradley, a brand of industrial control products, manufactured by Rockwell Automation
* AllianceBernstein (New York Stock Exchange Symbol AB), a US-based asset management firm
* American Biograph (film logo AB), a former motion picture company
* Anheuser-Busch, a brewing company
* Bonza (IATA code AB), an Australian airline

## Linguistics

* Ab (cuneiform), a written syllable
* Ab (Semitic), a Semitic word for "father"
* ab, a Welsh patronymic
* Ap (water), Vedic Sanskti term for water, surviving as In Persian as Āb

## Occupations and ranks

* Able Seaman (occupation), a civilian occupation
* Able Seaman (rank), a naval rank
* Airman Basic, the lowest rank in the United States Air Force

## Organizations

* Afrikaner Broederbond, a South African secret society from 1918 to 1994
* Aryan Brotherhood, an American gang

## Places

* Anzab-e Olya or Āb, a village in Iran
* AB postcode area, UK, including Aberdeen, Scotland
* Albania (WMO country code)
* Alberta (Canadian Province/Territory Code)
* Air Base, used by the United States Air Force for overseas bases
* Aschaffenburg (vehicle registration plate), Germany

## Science and technology

* AB (star catalogue) (Azzopardi / Breysacher), a catalogue of Wolf Rayet stars in the Small Magellanic Cloud
* Aggregate base
* AB Class amplifier, a classification of electric amplifier
* Category of abelian groups (Ab), in mathematics
* ApacheBench, a command line tool for Apache HTTP Server

### Chemistry

* Alabamine, a former name of the element astatine
* Albite, a feldspar mineral
* Ammonia borane, a chemical compound
* Antibonding (a.b.), used to describe the character of orbitals in atomic and molecular electronic structure

### Medicine

* AB blood, a blood type in the ABO blood group system
* AB toxin, Type III toxin secreted by some pathogenic bacteria
* Antibody (medical abbreviation)
* Rectus abdominis muscle (common name abs), a paired stomach muscle

## Religion

* Ab (Egyptian heart-soul concept), a concept of the heart-soul in ancient Egyptian religion
* Ab., a Hebrew abbreviation related to Pirkei Avot, a compilation of teachings and maxims from the Mishnaic period
* Aitareya Brahmana, an ancient Indian collection of sacred hymns

## Sport

* Akademisk Boldklub, a Danish professional football club
* Argja Bóltfelag, a Faroese association football club
* Aviron Bayonnais, French rugby union club
* At bat, in baseball statistics

## Transportation

* NZR Ab class, a New Zealand steam locomotive
* Armed boarding steamer, used by the UK during World War I for boarding enemy vessels
* AB, a US Navy hull classification symbol: Crane ship (AB)

## People

* AB de Villiers (born 1984), South African middle order batsman and wicket-keeper
* Adrien Broner (born 1989), American Boxer, nicknamed AB
* Allan Border (born 1955), Australian cricketer, nicknamed A.B.
* Antonio Brown (born 1988), American football player, nicknamed AB

## Other uses

* Ab (given name), a short form of Albert (or occasionally Abraham or Abbott)
* Ab (Mandaean month), a month of the Mandaean calendar
* AB, a South Australian dish made of hot potato chips, gyro meat and sauces, similar to a Halal snack pack
* Abkhaz language (ISO 639-1 language code ab), a Northwest Caucasian language spoken mostly by the Abkhaz people
* Adult baby, a person who practices paraphilic infantilism
* Bachelor of Arts (Latin: Artium baccalaureus)
* Assembly Bill, a type of legislation in the US
* AB (game), a guessing game similar to Mastermind