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

gollark: `UseLinux`

gollark: The functional programming discord.

gollark: No, Go is. It broke containment.

gollark: ```Little known fact: GHC compiles code by literally emailing it to the sixth circle of Hell, so no one knows how it works, not even the Type-level Deacons and other curators of scripture. The email address was revealed to the Haskell committee one moonless night when they sacrificed Simon Peyton Jones in an unholy ritual that they reenact every year at the monadic.party. The present-day SPJ is actually a decoy hired by FP Complete to preserve the illusion that anyone in the community even has a clue as to how to build working software.```

gollark: Well, things with more *features* might be slower.

AA