AA

AA or Aa may refer to:

Arts, entertainment and media

• America's Army, a 2002 computer game published by the U.S. Army
• Ancient Anguish, a computer game in existence since 1992
• Aa!, a J-Pop musical group
• Double-A (band), stylised as AA, South Korean boy band
• Aa (album), a 2016 album by Baauer
• Ace Attorney, a series of video games developed by Capcom.
• AA Films, an Indian film distribution company
• AA Book (disambiguation)
• AA, the production code for the 1966 Doctor Who serial The Savages

Brands and enterprises

• A. A. Arms, a defunct firearms manufacturer
• The AA, a trading name of The Automobile Association in the UK
• Alcoa, an American aluminum-producing company (stock symbol AA)
• American Airlines, largest U.S. airline; headquartered in Fort Worth, Texas
• Anadolu Agency, a state-run press agency in Turkey
• Audio-Animatronics, used at the Disney Parks

Language

• aa, Latin-script digraph used in the orthographies of Dutch, Finnish and other languages
• aa, representation of letter Å in several Scandinavian languages
• aa, a romanization of Arabic letter alif ا
• Afar language (ISO 639-1 language code aa)
• Aa (Bengali), a Bengali letter

Measurements

• AA, a size in brassiere measurement
• AA, a width in shoe sizes
• AA battery size

Nature

• Aa (plant), a genus of orchid
• Aa (snail), a subgenus of snail
• ʻAʻā or aa, a form of lava
• A term for "river" in German hydronymy, see Aach (toponymy)

Organizations

• Alcoholics Anonymous, a worldwide fellowship of persons recovering from alcoholism
• AA Motoring Trust, a British road safety charity that merged with IAM Motoring Trust
• Academia de Artes, Mexico
• Alvesta Alternative, a political party in Sweden
• Amalgamated Association of Iron and Steel Workers, a former union in the United States
• Andecha Astur, an Asturian nationalist party
• Architectural Association School of Architecture, London, United Kingdom
• Astrological Association of Great Britain, London, United Kingdom
• Auswärtiges Amt, the Foreign Office of Germany
• Automobile Association (disambiguation)
• Danish Association of Architects (Akademisk Arkitektforening)
• The Automobile Association, a British motoring organization

Philosophy and religion

• A∴A∴, a spiritual organization created in 1907 by Aleister Crowley
• Abhisamayalankara, or Abhisamaya-alaṅkāra, a Mahayana Buddhist text
• Augustinians of the Assumption, a congregation of Catholic religious (priests and brothers)
• Statue of A'a from Rurutu, a wooden fertility-god sculpture from the Pacific island of Rurutu
• "A is A", an expression of the law of identity: each thing is identical with itself

People

• Aa (surname), a Scandinavian surname, including a list of people with this name
• Van der Aa (surname), a Dutch surname, including a list of people with this name
• Aa (architect), an architect in ancient Egypt
• Anthony Armstrong (writer) (1897–1972), Anglo-Canadian writer who used the pseudonym A.A.

Places

• Aa, Estonia, a village and beach in Estonia
• Aa, Indonesia, a populated place in the South Sulawesi province of Indonesia
• Ann Arbor, a city in Michigan, United States of America

Rivers

Belgium

• Aa, a river in Antwerp, which joins the Nete

France

• Aa (river, France), a river in northern France

Germany

• Aabach (Afte), formerly called the Große Aa, a river in North Rhine-Westphalia
• Aa (Möhne), a river in North Rhine-Westphalia
• Aa (Nethe), a river in North Rhine-Westphalia
• Aa (Werre), a river in North Rhine-Westphalia
• Kleine Aa (Aabach), a tributary of the Aabach in North Rhine-Westphalia
• Große Aa, a tributary of the Ems in Lower Saxony
• Große Aa (Aabach), a tributary of the Aabach in North Rhine-Westphalia
• Münstersche Aa, a river in Germany, one of several Westphalian rivers called Aa

Netherlands

• Aa (Meuse), a river in North Brabant, which joins the Dommel to form the Dieze
• Aa of Weerijs, a river in North Brabant, which joins the Mark at Breda
• Drentsche Aa, a river in Drenthe and Groningen
• Mussel Aa, a river in Westerwolde, Groningen
• Ruiten Aa, a river in Westerwolde, Groningen
• Westerwoldsche Aa, a river near Oudeschans, Groningen

Switzerland

• Aabach (Aare), a tributary of the Aare in canton of Aargau
• Aabach (Greifensee), or Usterner Aa, a river in canton of Zürich
• Aabach (Obersee), a tributary of Obersee (Zürichsee), in canton of St. Gallen
• Aabach (Seetal), a river in the cantons of Lucerne and Aargau, runs through Lake Hallwyl
• Chli Aa (Sempachersee), a tributary of Lake Sempach in the canton of Lucerne
• Engelberger Aa, a river in the cantons of Obwalden and Nidwalden, tributary of Lake Lucerne
• Gross Aa (Sempachersee), a tributary of Lake Sempach in the canton of Lucerne
• Mönchaltorfer Aa, a tributary of Greifensee in canton of Zürich
• Sarner Aa (river), a river in Obwalden, tributary of Lake Lucerne

Latvia

• Gauja, a river in Latvia, formerly known as Livländische Aa
• Lielupe, a river in Latvia, formerly known as Kurländische Aa

Science and technology

• AA amyloidosis, a form of amyloidosis related to serum amyloid A
• Amino acid, often abbreviated aa when indicating positions in a peptide sequence (e.g., aa 120-150)
• Antiandrogen, a drug which blocks the effects of androgens
• Aplastic anemia, a rare disease
• Arachidonic acid, a polyunsaturated fatty acid
• Advanced Architecture, original name of Amiga Advanced Graphics Architecture
• Anti-aliasing, various techniques for mitigating certain signal processing artifacts
• Atlas Autocode, a computer programming language
• AA, a proprietary digital audio format of Audible.com
• Authoritative Answer, in DNS, a flag for a query answer
• AA postulate of Euclidean geometry
• Anti-aircraft, in military use
• Abampere (aA), the CGS unit of current
• Attoampere (aA), a unit of electric current equal to 10⁻¹⁸ Ampere
• AA tree, named after Arne Andersson
• AA, the abbreviation for azidoazide azide
• AppArmor

Sports

• Double-A (baseball) or Class AA, a classification level in Minor League Baseball
• American Association (19th century), baseball
• American Association (20th century), baseball
• American Association of Independent Professional Baseball, started in 2006
• Athletics Australia, national sporting organisation in Australia

Transportation

• AA Highway, a state highway in Northern Kentucky
• Ann Arbor Railroad (1895–1976), a defunct railroad in Ohio and Michigan
• Ann Arbor Railroad (1988), a railroad operating in Ohio and Michigan
• K line, a defunct line on the New York City Subway, formerly called "AA"
• NZR A^A class, a locomotive class operated by the New Zealand Railways Department

Other uses

• African American, as a cultural identity
• Asian Aerospace, an airshow in Asia
• Associate of Arts, an academic degree
• European Union Association Agreement
• Postal abbreviation for United States armed forces in the Americas
• Japanese internet slang for Shift JIS art
• Internet slang for ASCII Art

See also

• A (disambiguation)
• Å (disambiguation)
• Aach (toponymy)
• AAA (disambiguation)
• AAAA (disambiguation)
• Aabach (disambiguation)
• Grosse Aa (disambiguation)
• Kleine Aa (disambiguation)
• A Aa, a film