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
See also
- A/B (disambiguation)
- BA (disambiguation)
- A-flat (disambiguation) ("A♭"), the musical note, scale, or key
- Av (month), a month in the Hebrew calendar
- Amyloid beta (Aβ), peptides of amino acids that are involved in Alzheimer's disease
This disambiguation page lists articles associated with the title AB.
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