AA

Look up AA, Aa, 'A'a, aa, or aA in Wiktionary, the free dictionary.

AA may refer to:

People

American Airlines Inc., largest U.S. airline; headquartered in Fort Worth, Texas, United States
Alcoholics Anonymous, a worldwide fellowship of persons recovering from alcoholism
The Automobile Association, a British motoring organization
Academia de Artes, Mexico
Alcoa, an American aluminum-producing company with the stock ticker symbol AA
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, United Kingdom
Astrological Association of Great Britain, London, United Kingdom
Auswärtiges Amt, the Foreign Office of Germany

AA amyloidosis, a form of amyloidosis related to Serum amyloid A
Aa (plant), a genus of orchid
Aa (snail), subgenus in Philonesia
Aa., artery
Alopecia areata, an autoimmune disease in which hair loss occurs
amino acid, often abbreviated aa when indicating positions in a peptide sequence (e.g. aa 120-150)
Arachidonic acid, a polyunsaturated fatty acid

AA, or 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, proprietary digital audio format of Audible.com
Authoritative Answer, in DNS a flag for query answer

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
Athletics Australia, the National Sporting Organisation (NSO) recognised by the Australian Sports Commission for the sport of athletics in Australia
Attitude Adjustment, a wrestling move used by John Cena
Double-A (baseball), a level in the farm system of minor league baseball

American Airlines Inc., a major U.S. airline headquartered in Fort Worth, Texas by IATA airline code
AA Publishing, a trading name of The Automobile Association in the UK
AA Motoring Trust, a British road safety charity that merged with IAM Motoring Trust
Ann Arbor Railroad (1895–1976), a defunct railroad in Ohio and Michigan
Ann Arbor Railroad (1988), a railroad operating in Ohio and Michigan
AA, a former name of the K line, a defunct line on the New York City Subway
NZR AA class, a locomotive class operated by the New Zealand Railways Department
Automobile Association (disambiguation)
AA Highway, a state highway in Northern Kentucky

AA, representation of Å, letter found in several languages including Swedish, Norwegian and Danish
Aa (digraph), a digraph used in several languages using the Latin alphabet
aa, Afar language, language code ISO 639-1

AA battery size
ʻAʻā, a form of lava
Abhisamayalankara, or Abhisamaya-alaṅkāra, a Mahayana Buddhist text
A∴A∴, (Latin: Argenteum Astrum), a magical order created by Aleister Crowley
Asian Aerospace, an airshow in Asia
Associate of Arts degree
Augustinians of the Assumption, a congregation of Catholic religious (priests and brothers)
A small size in Brassiere measurement
Double A-side, a gramophone or phonograph record single with two featured songs
postal abbreviation for United States armed forces in the Americas
AA, a width in shoe size
"A is A", an expression from the philosophy of Objectivism