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AA, Aa, Double A, or Double-A may refer to:


Arts, entertainment and media

* ''
America's Army ''America's Army'' is a series of first-person shooter video games developed and published by the U.S. Army, intended to inform, educate, and recruit prospective soldiers. Launched in 2002, the game was branded as a strategic communication devi ...
'', 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) Double-A ( ko, 더블에이; pronounced "Double-A"), stylized as "AA", was a South Korean boy band formed by Wellmade Yedang, formerly known as Well Made STAR M in 2011. The group consists of two members: Woosang and Hoik. Since 2015, Blue Star ...
, stylised as AA, South Korean boy band * ''Aa'' (album), a 2016 album by Baauer * AA (song), a 2021 single by Walker Hayes * Ace Attorney, a series of video games developed by Capcom. *
AA Films AA Films is an Indian motion picture Film distribution, distribution company, owned by Anil Thadani. It mainly distributes Bollywood, Hindi films and Hindi-dubbed South Indian Cinema, South Indian films in North India. Background AA Films was f ...
, an Indian film distribution company * AA Book (disambiguation) *AA, the production code for the 1966 ''Doctor Who'' serial '' The Savages''


Brands, organizations and enterprises

* Alcoholics Anonymous, an international fellowship dedicated to helping alcoholics peer to peer in sobriety * A. A. Arms, a defunct firearms manufacturer * Aerolíneas Argentinas, an Argentine airline (logo used to consist of two A's) * Air Asia, an Asian multinational low cost carrier * Alcoa, an American aluminum-producing company (stock symbol AA) *
American Airlines American Airlines is a major US-based airline headquartered in Fort Worth, Texas, within the Dallas–Fort Worth metroplex. It is the largest airline in the world when measured by fleet size, scheduled passengers carried, and revenue passenge ...
, major American full-service airline (IATA airline code, logo used to consist of two A’s) *
Anadolu Agency Anadolu Agency ( tr, Anadolu Ajansı, ; abbreviated AA) is a state-run news agency headquartered in Ankara, Turkey. History The Anadolu Agency was founded in 1920 during the Turkish War of Independence by the order of Mustafa Kemal Ataturk. As ...
, a state-run press agency in Turkey *
Audio-Animatronics Audio-Animatronics (also known as simply Animatronics, and sometimes shortened to AAs) is the registered trademark for a form of robotics animation created by Walt Disney Imagineering for shows and attractions at Disney theme parks, and subseque ...
, used at the Disney Parks *
Academia de Artes The Academia de Artes (AA) is the Mexican Academy of Arts founded 1967/1968 by CONACULTA for the promotion of Mexican art. Seat of the institution is the Museo Nacional de San Carlos in Mexico City. The Slogan of the Acadademy is ''elevación por ...
, Mexico *
Amalgamated Association of Iron and Steel Workers Amalgamated Association of Iron and Steel Workers (AA) was an American labor union formed in 1876 to represent iron and steel workers. It partnered with the Steel Workers Organizing Committee of the CIO, in November 1935. Both organizations dis ...
, a former union in the United States *
Andecha Astur "socialist and nationalist flag of Asturias used by Andecha Astur Andecha Astur (Asturian language, Asturian for: ''Asturian Group'') is an Asturian nationalism, Asturian nationalist leftist political party of Spain. History The party was fou ...
, an Asturian nationalist party *
Architectural Association School of Architecture The Architectural Association School of Architecture in London, commonly referred to as the AA, is the oldest independent school of architecture in the UK and one of the most prestigious and competitive in the world. Its wide-ranging programme ...
, London, United Kingdom * Astrological Association of Great Britain, London, United Kingdom * ''
Auswärtiges Amt , logo = DEgov-AA-Logo en.svg , logo_width = 260 px , image = Auswaertiges Amt Berlin Eingang.jpg , picture_width = 300px , image_caption = Entrance to the Foreign Office building , headquarters = Werderscher Mark ...
'', the Foreign Office of Germany *
Danish Association of Architects The Danish Association of Architects (Danish: , abbreviated to AA), is an independent professional body for architects in Denmark. History The Danish Association of Architects was founded at the initiative of L. A. Petersen on 21 November 1879 ...
(''Akademisk Arkitektforening'') *
The AA AA Limited, trading as The AA (formerly The Automobile Association), is a British motoring association. Founded in 1905, it provides vehicle insurance, driving lessons, breakdown cover, loans, motoring advice, road maps and other services. ...
(formerly The Automobile Association), a British motoring organization *
AA Ireland AA Ireland Ltd is an automotive services company in Ireland, founded in 1910. It provides rescue services, personal lines insurance, and travel, technical and information services. Its AA Roadwatch service supplies traffic and travel information ...
, an Irish automotive services company *
AA Motoring Trust IAM RoadSmart formerly called the Institute of Advanced Motorists (IAM) is a charity based in the United Kingdom and serving nine countries, whose objective is to improve car driving and motorcycle riding standards, and so enhance road safety, ...
, a former British road safety charity operated by The AA that was merged to form the
IAM Motoring Trust IAM RoadSmart formerly called the Institute of Advanced Motorists (IAM) is a charity based in the United Kingdom and serving nine countries, whose objective is to improve car driving and motorcycle riding standards, and so enhance road safety, ...


Philosophy and religion

*
A∴A∴ The A∴A∴ ( ) is a magical organization described in 1907 by occultist Aleister Crowley. Its members are dedicated to the advancement of humanity by perfection of the individual on every plane through a graded series of universal initiatio ...
, a spiritual organization created in 1907 by Aleister Crowley *
Abhisamayalankara The "Ornament of/for Realization , abbreviated AA, is one of five Sanskrit-language Mahayana śastras which, according to Tibetan tradition, Maitreya revealed to Asaṅga in northwest India circa the 4th century AD. (Chinese tradition recogniz ...
, or Abhisamaya-alaṅkāra, a Mahayana Buddhist text *
Augustinians of the Assumption The Assumptionists, officialy named the Congregation of the Augustinians of the Assumption ( la, Congregatio Augustinianorum ab Assumptione) abbreviated AA,is a Catholic clerical religious congregation of Pontifical Right for men (priests and b ...
, a congregation of Catholic religious (priests and brothers) *
Statue of A'a from Rurutu The Statue of A'a from Rurutu is a wooden sculpture of the god A'a that was made on the Pacific island of Rurutu in the Austral archipelago. In the early nineteenth century, the sculpture was given by the islanders to the London Missionary Soci ...
, 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


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 The romanization of Arabic is the systematic rendering of Modern Standard Arabic, written and varieties of Arabic, spoken Arabic language, Arabic in the Latin script. Romanized Arabic is used for various purposes, among them transcription of na ...
letter alif ا * Ꜳ, an
orthographic ligature In writing and typography, a ligature occurs where two or more graphemes or letters are joined to form a single glyph. Examples are the characters æ and œ used in English and French, in which the letters 'a' and 'e' are joined for the first ...
*
Afar language The Afar language ( aa, Qafaraf, links=no; also known as ’Afar Af, Afaraf, Qafar af) is an Afroasiatic language belonging to the Cushitic branch. It is spoken by the Afar people inhabiting Djibouti, Eritrea and Ethiopia. Classification Afar ...
(ISO 639-1 language code aa) *
Aa (Bengali) The Bengali script or Bangla alphabet ( bn, বাংলা বর্ণমালা, ''Bangla bôrṇômala'') is the alphabet used to write the Bengali language based on the Bengali-Assamese script, and has historically been used to w ...
, a Bengali letter


Measurements

* AA, a bra size * AA, a width in
shoe size A shoe size is an indication of the fitting size of a shoe for a person. There are a number of different shoe-size systems used worldwide. While all shoe sizes use a number to indicate the length of the shoe, they differ in exactly what they me ...
s * 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) ''Aach'' (variants ''Ach'', ''Ache''; ''Aa'') is a widespread Upper German hydronym, from an Old High German ''aha'' (Proto-Germanic '' *ahwō'') "running water" (ultimately from PIE '' *hakʷā-'' "(moving) water"). The word has also been reduc ...


People

*
Aa (surname) Aa is a Scandinavian surname. Notable people with the surname include: * Brynjar Aa (born 1960), Norwegian dramatist * Terje Aa (born 1961), Norwegian bridge player See also *Van der Aa (surname) Van der Aa is a Dutch language, Dutch toponymi ...
, a Scandinavian surname, including a list of people with this name *
Van der Aa (surname) Van der Aa is a Dutch toponymic surname meaning "from the Aa (river)", of which there are a few dozen in the Low Countries alon Those bearing this name include: * Abraham Jacob van der Aa (1792-1857), Dutch author of biographical and geographical ...
, a Dutch surname, including a list of people with this name *
Aa (architect) Aa, possibly AaAa (ˁȝˁȝ), was an ancient Egyptian architect and construction supervisor. His title was "Overseer of Construction Workers" or "Great Overseer of Construction Workers". He lived in the time of the Middle Kingdom of Egypt (between ...
, 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 Anne, alternatively spelled Ann, is a form of the Latin female given name Anna. This in turn is a representation of the Hebrew Hannah, which means 'favour' or 'grace'. Related names include Annie. Anne is sometimes used as a male name in the ...
, a city in Michigan, United States of America


Rivers


Belgium

* Aa (Nete), a river in the province of Antwerp, which joins the Nete


France

*
Aa (France) The Aa (; pcd, Abbe) is a river in northern France that is 93 km (58 miles) long. Originating near the village of Bourthes and emptying into the North Sea near Gravelines, the Aa is located near the north-eastern limit of the English Channel. ...
, a river in northern France


Germany

* Aabach (Afte), formerly called the Große Aa, a river in North Rhine-Westphalia *
Aa (Möhne) Aa is a river of North Rhine-Westphalia, Germany. It is long and is a left tributary of the Möhne in Brilon. The river has a watershed of . The source of Aa is in the village of Altenbüren. From here it flows in an easterly direction. At ...
, a river in North Rhine-Westphalia *
Aa (Nethe) The Aa is a 20.6 km long, orographic left tributary of the Nethe river in North Rhine-Westphalia, Germany. The Aa belongs as a tributary of the Nethe to the river system of the Weser. Geography The Aa's source is located on the eastern s ...
, a river in North Rhine-Westphalia * Aa (Werre), a river in North Rhine-Westphalia * Bocholter Aa, a river in North Rhine-Westphalia *
Dreierwalder Aa Dreierwalder Aa (also: ''Ibbenbürener Aa'', ''Ledder Mühlenbach'', ''Hörsteler Aa'') is a river of North Rhine-Westphalia, Germany. It flows into the Speller Aa in Spelle. See also *List of rivers of North Rhine-Westphalia A list of rivers o ...
, 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 The Münstersche Aa () is a river in the Münster region of Westphalia in Germany. It is a left tributary of the Ems. The Münstersche Aa begins near Havixbeck, flows southeast until Münster, and then north to Greven, where it flows into the Em ...
, a river in North Rhine-Westphalia *
Schaler Aa Schaler Aa is a river of Lower Saxony and North Rhine-Westphalia, Germany. It flows into the Große Aa south of Freren. The river springs as Weeser Aa southeast of the Ankum Heights and east of Merzen in Lower Saxony. After crossing the boundar ...
, a river in Lower Saxony and North Rhine-Westphalia * Speller Aa, a river in Lower Saxony and North Rhine-Westphalia *
Steinfurter Aa Steinfurter Aa is a river of North Rhine-Westphalia, Germany. It flows through Steinfurt, and joins the Vechte near Wettringen. See also *List of rivers of North Rhine-Westphalia A list of rivers of North Rhine-Westphalia, Germany: A * Aa, ...
, a river in North Rhine-Westphalia


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 * , a river in Westerwolde, Groningen * Westerwoldsche Aa, a river near
Oudeschans Oudeschans () is a small village with a population of around 100 in the municipality of Westerwolde in the province of Groningen in the Netherlands. The 16th-century fortification is now a state protected village area with several national heri ...
, Groningen


Switzerland

* Aabach (Aare), a tributary of the Aare in canton of Aargau * Aabach (Greifensee), or Ustermer 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) __NOTOC__ Lake Sempach (German: ''Sempachersee'') is a lake in the canton of Lucerne, Switzerland. Its area is about and its maximum depth is . A island named ''Gamma Insel'' is located east of Sursee. In the 17th century the lake counted with ...
, 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 The Gauja River ( et, Koiva jõgi, german: Livländische Aa) is a river in the Vidzeme region of Latvia. It is the only large river of Latvia that begins and ends its flow in Latvia. Its length is 460 km, of which 93.5 km (approxim ...
, 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 Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. Although hundreds of amino acids exist in nature, by far the most important are the alpha-amino acids, which comprise proteins. Only 22 alpha ...
, often abbreviated ''aa'' when indicating positions in a peptide sequence (e.g., aa 120–150) *
Antiandrogen Antiandrogens, also known as androgen antagonists or testosterone blockers, are a class of drugs that prevent androgens like testosterone and dihydrotestosterone (DHT) from mediating their biological effects in the body. They act by blocking the ...
, a drug which blocks the effects of androgens *
Aplastic anemia Aplastic anemia is a cancer in which the body fails to make blood cells in sufficient numbers. Blood cells are produced in the bone marrow by stem cells that reside there. Aplastic anemia causes a deficiency of all blood cell types: red blood ...
, 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 Anti-aircraft warfare, counter-air or air defence forces is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It includes surface based, ...
, in military use * Abampere (aA), the CGS unit of current * Attoampere (aA), a unit of electric current equal to 10−18
Ampere The ampere (, ; symbol: A), often Clipping (morphology), shortened to amp,SI supports only the use of symbols and deprecates the use of abbreviations for units. is the unit of electric current in the International System of Units (SI). One amp ...
* AA tree, named after Arne Andersson * AA, the abbreviation for
azidoazide azide 1-Diazidocarbamoyl-5-azidotetrazole, often jokingly referred to as azidoazide azide, is a heterocyclic inorganic compound with the formula C2N14. It is an extremely sensitive explosive. Synthesis 1-Diazidocarbamoyl-5-azidotetrazole was produced ...
* AppArmor


Sports

*
Double-A (baseball) Double-A (officially Class AA) is the second-highest level of play in Minor League Baseball in the United States since 1946, below only Triple-A. There are currently 30 teams classified at the Double-A level, one for each team in Major League ...
or Class AA, a classification level in Minor League Baseball since 1912 *
American Association (1882–1891) The American Association of Base Ball Clubs (AA) was a professional baseball league that existed for 10 seasons from to . Together with the National League (NL), founded in , the AA participated in an early version of the World Series seven ti ...
, a professional baseball league in the United States from 1882 to 1891 *
American Association (1902–1997) The American Association (AA) was a Minor League Baseball league that operated primarily in the Midwestern and South Central United States from 1902 to 1962 and 1969 to 1997. It was classified as a Triple-A league, which is one grade below Maj ...
, a professional baseball league in the United States from 1902 to 1962 and 1969 to 1997 *
American Association of Professional Baseball The American Association of Professional Baseball is an independent professional baseball league founded in 2005. It operates in the central United States and Canada, mostly in cities not served by Major League Baseball teams or their minor lea ...
, a professional baseball league in the United States and Canada since 2006 *
Athletics Australia Athletics Australia is the national sporting organisation (NSO) recognised by Sport Australia for the sport of athletics in Australia. First founded in 1897, the organisation is responsible for administering a sport with over 16,000 registere ...
, national sporting organisation in Australia


Transportation

* AA Highway, a state highway in Northern Kentucky *
Ann Arbor Railroad (1895–1976) The Ann Arbor Railroad was an American railroad that operated between Toledo, Ohio, and Elberta and Frankfort, Michigan (about 294 route miles) with train ferry operations across Lake Michigan. In 1967 it reported 572 million net ton-miles ...
, 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 AA class, a locomotive class operated by the New Zealand Railways Department


Other uses

*
African American African Americans (also referred to as Black Americans and Afro-Americans) are an Race and ethnicity in the United States, ethnic group consisting of Americans with partial or total ancestry from sub-Saharan Africa. The term "African American ...
, as a cultural identity * Asian Aerospace, an airshow in Asia *
Associate of Arts An associate degree is an undergraduate degree awarded after a course of post-secondary study lasting two to three years. It is a level of qualification above a high school diploma, GED, or matriculation, and below a bachelor's degree. The f ...
, an academic degree *
European Union Association Agreement A European Union Association Agreement or simply Association Agreement (AA) is a treaty between the European Union (EU), its Member States and a non-EU country that creates a framework for co-operation between them. Areas frequently covered by s ...
* Postal abbreviation for United States armed forces in the Americas * Japanese internet slang for Shift JIS art * Internet slang for
ASCII Art ASCII art is a graphic design technique that uses computers for presentation and consists of pictures pieced together from the 95 printable (from a total of 128) character (computing), characters defined by the ASCII Standard from 1963 an ...


See also

*
A (disambiguation) A is the first letter of the Latin and English alphabet. A may also refer to: Science and technology Quantities and units * ''a'', a measure for the attraction between particles in the Van der Waals equation * ''A'' value, a measure o ...
* Å (disambiguation) *
Aach (toponymy) ''Aach'' (variants ''Ach'', ''Ache''; ''Aa'') is a widespread Upper German hydronym, from an Old High German ''aha'' (Proto-Germanic '' *ahwō'') "running water" (ultimately from PIE '' *hakʷā-'' "(moving) water"). The word has also been reduc ...
*
AAA (disambiguation) AAA, Triple A, or Triple-A is a three-letter initialism or abbreviation which may refer to: Airports * Anaa Airport in French Polynesia (IATA airport code AAA) * Logan County Airport (Illinois) (FAA airport code AAA) Arts, entertainment, and me ...
*
AAAA (disambiguation) AAAA may refer to: Internet and computing * AAAA protocol, within computer security, "authentication, authorization, accounting and auditing" - the AAA protocol combined with auditing * AAAA record, also known as "IPv6 address record", maps a h ...
* Aabach (disambiguation) *
Grosse Aa (disambiguation) Große or Grosse is a German surname. Notable people with the surname include: *Demetrius Grosse *Maurice Grosse *Katharina Grosse *Ben Grosse *Hans-Werner Grosse *Heinz-Josef Große *Julius Grosse Julius Waldemar Grosse (25 April 1828 – 9 ...
*
Kleine Aa (disambiguation) Kleine Aa may refer to: *Chli Aa (Schwyz), a river in canton of Schwyz, Switzerland *Chli Aa (Sempachersee), a tributary of Lake Sempach in the canton of Lucerne, Switzerland *Kleine Aa (Aabach), a tributary of the Aabach in North Rhine-Westphalia, ...
* '' A Aa'', a film *
Automobile Association (disambiguation) Automobile associations, also referred to as motoring clubs, motoring associations, motor clubs, are organizations, either for-profit or non-profit, which motorists (drivers and vehicle owners) can join to enjoy benefits provided by the club relat ...
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