AA

AA may refer to:

AA

Organizations and businesses

• Alcoa, an American aluminium-producing company with the stock ticker symbol AA
• Alcoholics Anonymous, a worldwide fellowship of persons recovering from alcoholism
• 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
• Architects' Association of Denmark (Akademisk Arkitektforening)
• Architectural Association School of Architecture, London
• The Automobile Association, a British motoring organisation
• Foreign Office (Germany) (Auswärtiges Amt), the Foreign Office of Germany

Transportation

• AA, a former name of the K line, a defunct line on the New York City Subway
• American Airlines, IATA airline code
• Ann Arbor Railroad (disambiguation), a railroad connecting Ann Arbor, Michigan and Toledo, Ohio in the United States
• NZR AA class, a locomotive class operated by the New Zealand Railways Department
• Automobile Association (disambiguation)
• The Automobile Association (Ireland), an Irish motoring organisation
  • within a country to refer to the Automobile Association of that country, such as the New Zealand Automobile Association
• AA Motoring Trust, a British road safety charity that merged with IAM Motoring Trust
• AA Publishing, a trading name of The Automobile Association in the UK

Sports, games and pastimes

• America's Army, a computer game published by the U.S. Army
• American Association (19th century), baseball
• American Association (20th century), baseball
• American Association of Independent Professional Baseball started in 2006
• Ancient Anguish, an LPMud (computer game) in existence since 1992
• Double-A, a level in the Farm System of minor league baseball
• Asociación Alumni, an Argentinean rugby union club
• Athletics Australia
• Attitude Adjustment, a wrestling move used by John Cena

Science, medicine, mathematics and computing

• ʻAʻā (lava flow), a type of basaltic lava flow
• AA, or Advanced Architecture, original name of Amiga Advanced Graphics Architecture
• AA amyloidosis, a form of amyloidosis related to Serum amyloid A
• AA postulate of Euclidian geometry
• Academia de Artes, Mexico
• Aggregatibacter actinomycetemcomitans, a species of bacteria found to be in association with certain types of periodontal disease
• Amplitude of accommodation, a measurement of the eye's ability to focus clearly on objects at near distances
• Antarctic Impulse Transient Antenna, also known as AA-experiment
• Anti-aliasing, an signal and image processing technique
• Arachidonic acid, a polyunsaturated fatty acid
• Atlas Autocode, a computer programming language

Military

• Antiaircraft
• A written military acronym for Al Asad Airbase in Al Anbar Province, Iraq

Other

• AA battery size
• AA Brassiere measurement
• Abhisamayalankara, or Abhisamaya-alaṅkāra, a Mahayana Buddhist text
• Anti-aircraft warfare, a military term for combat against airborne enemies from the ground
• Anti-aliasing filter a filter used in digital signal processing
• Aruba, FIPS PUB 10-4 country code
• Asian Aerospace, the biggest airshow event in Asia
• Associate of Arts degree
• Augustinians of the Assumption, a congregation of Catholic religious (priests and brothers)
• Audio-Animatronics
• The production code for The Savages (Doctor Who), a Doctor Who serial
• United States armed forces in the Americas, [List of U.S. state abbreviations|postal abbreviation]] for

A∴A∴

• A∴A∴, (Latin: Argenteum Astrum), a magical order created by Aleister Crowley

Aa

• Å, letter found in several languages including Swedish, Norwegian and Danish
• Aa River (disambiguation), the name of several waterways in Europe
• Aa! Megami-sama or Oh My Goddess!, a popular anime/manga series
• Aa (Big A Little a), an American noise rock group
• Aa!, a J-Pop musical group
• Aa (architect), an architect in ancient Egypt
• Aa (lava flow), a type of lava (see below)
• Aa (plant), a genus of orchid
• Aa, Estonia, a village on northern coast of Estonia

People with the surname Aa

• Van der Aa, a Dutch name
  • Abraham Jacob van der Aa (1792–1857), Dutch literator
  • Christianus Petrus Eliza Robidé van der Aa (1791–1851), Dutch jurist and author
  • Cornelis van der Aa (1749–1816), Dutch bookseller
  • Dirk van der Aa (1731–1809), Dutch rococo painter
  • Michel van der Aa (born 1970), Dutch composer
  • Petrus van der Aa (1530—1594), a Flemish jurist
  • Philips van der Aa, a Dutch statesman during the Eighty Years' War
  • Pieter van der Aa (1659—1733), a Dutch publisher
• Brynjar Aa, a Norwegian dramatist
• Terje Aa, bridge player

'A'ā

• ʻAʻā (lava flow), one of three basic types of lava flow

aA

• abampere, the CGS unit of current
• attoampere, 10⁻¹⁸ ampere, a unit of electric current

aa

• Aa (digraph), see List of Latin digraphs
• Afar language, ISO 639 alpha-2 language code
• Authoritative Answer, in DNS a flag for query answer

.aa

• a proprietary digital audio format of Audible.com

Aa.

• Aa., medical abbreviation for arteria, or artery

Double A

• Double A (band), Korean K-pop boy band
• Double A-side, a gramophone or phonograph record single with two featured songs

See also

• Å (disambiguation)
• AAAA (disambiguation)
• AAA (disambiguation)
• A (disambiguation)