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 devic ...

'', 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), stylized as AA, South Korean boy band * ''Aa'' (album), a 2016 album by Baauer * AA (song), a 2021 single by Walker Hayes * ''

Ace Attorney ''Ace Attorney'' is a visual novel franchise developed by Capcom. With storytelling fashioned after legal dramas, the first entry in the series, '' Phoenix Wright: Ace Attorney'', was released in 2001; since then five further main series game ...

'', a series of video games developed by Capcom. *

AA Films AA Films is an Indian motion picture distribution company, owned by Anil Thadani. It mainly distributes Hindi films and Hindi Modern Standard Hindi (, ), commonly referred to as Hindi, is the Standard language, standardised variety of ...

, an Indian film distribution company *

AA Book (disambiguation) AA Book may refer to: *''Projects Review'', or the AA Book, of the Architectural Association School of Architecture *''The Big Book'' of Alcoholics Anonymous Alcoholics Anonymous (AA) is a global, peer-led Mutual aid, mutual-aid fellowship focus ...

*AA, the production code for the 1966 ''Doctor Who'' serial '' The Savages'' *

Academy Award The Academy Awards, commonly known as the Oscars, are awards for artistic and technical merit in film. They are presented annually by the Academy of Motion Picture Arts and Sciences (AMPAS) in the United States in recognition of excellence ...

, in the film industry

Brands, organizations and enterprises

Alcoholics Anonymous Alcoholics Anonymous (AA) is a global, peer-led Mutual aid, mutual-aid fellowship focused on an abstinence-based recovery model from alcoholism through its spiritually inclined twelve-step program. AA's Twelve Traditions, besides emphasizing anon ...

, support organization * A. A. Arms, a defunct firearms manufacturer *

Aerolíneas Argentinas Aerolíneas Argentinas, formally ''Aerolíneas Argentinas S.A.'', is the state-owned flag carrier of Argentina and the country's largest airline. The airline was created in 1949, from the merger of Aeroposta Argentina (AA), Aviación del Lito ...

, an Argentine airline *

Air Asia Capital A Berhad (), operating as AirAsia (stylised as ''airasia'') is a Malaysian multinational low-cost airline headquartered near Kuala Lumpur, Malaysia. Established in 1993 and commencing operations in 1996, the airline is the largest in ...

, an airline *

Air Austral Air Austral is a French airline that is also the flag carrier of the Overseas departments and regions of France, overseas department and region of Réunion. The airline is based at Roland Garros Airport. It operates scheduled services from Réu ...

airline, former logo *

Alcoa Alcoa Corporation (an acronym for "Aluminum Company of America") is an American industrial corporation. It is the world's eighth-largest producer of aluminum. Alcoa conducts operations in 10 countries. Alcoa is a major producer of primary alu ...

, a US aluminum producer, stock symbol *

American Airlines American Airlines, Inc. is a major airlines of the United States, major airline in the United States headquartered in Fort Worth, Texas, within the Dallas–Fort Worth metroplex, and is the Largest airlines in the world, largest airline in the ...

, IATA code *

Anadolu Agency Anadolu Agency (, ; 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 Pasha. As the Empire's capital � ...

, press agency, Turkey *

Arakan Army The Arakan Army (; Abbreviation, abbreviated AA), sometimes referred to as the Arakha Army is an Ethnic nationalism, ethnic-List of insurgent groups in Myanmar, armed organisation based in Rakhine State (Arakan). Founded in April 2009, the Ara ...

, Rakhine State, Myanmar, a rebel group *

Audio-Animatronics Audio-Animatronics (also known simply as AAs) are a form of Mechatronics, mechatronic animatronics puppetry created by Walt Disney Imagineering and Trademark, trademarked by The Walt Disney Company for use in designed shows and attractions at Disn ...

, used at Disney Parks * Academia de Artes, Mexico * Former US

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 di ...

Architectural Association School of Architecture The Architectural Association School of Architecture in London, commonly referred to as the AA, is the oldest private school of architecture in the UK. The AA hosts exhibitions, lectures, academic conference, symposia and publications. Histo ...

, London, United Kingdom * Astrological Association of Great Britain, London, UK * Auswärtiges Amt, the Foreign Office of Germany * Danish Association of Architects (''Akademisk Arkitektforening'') *

The AA AA Limited, trading as The AA, is a British motoring association. Founded in 1905, it provides vehicle insurance, Driver's education, driving lessons, breakdown cover, loans, motoring advice, road maps and other services. The association Demut ...

, UK motoring organization * AA Ireland, an Irish automotive services company * AA Motoring Trust, merged into IAM Motoring Trust

Education

Albuquerque Academy Albuquerque Academy, known locally as simply the Academy, is an independent, co-educational day school for grades 6-12 located in Albuquerque, New Mexico. The school is accredited by the Independent Schools Association of the Southwest

, independent school in Albuquerque, New Mexico *

Associate of Arts An associate degree or associate's degree is an undergraduate degree awarded after a course of post-secondary study lasting two to three years. It is a level of academic qualification above a high school diploma and below a bachelor's degree ...

, an academic degree

Philosophy and religion

A∴A∴ The A∴A∴ ( ) is a magical organization established in 1907 by Aleister Crowley, a Western esotericist. Its members are dedicated to the advancement of humanity by perfection of the individual on every plane through a graded series of univ ...

, a spiritual organization created in 1907 by Aleister Crowley *

Abhisamayalankara The "Ornament of/for Realization , abbreviated AA, is one of five Sanskrit-language Mahayana sutras, Mahayana śastras which, according to Tibetan tradition, Maitreya revealed to Asanga, Asaṅga in northwest India circa the 4th century AD. ...

, 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 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 most likely in the late 1500s to mid 1600s. In the early nineteenth century, the sculpture was given ...

, 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 * Iah, an ancient moon deity * AA or A.A. ( After Adam), year notation in the Mandean calendar

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 * , 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 and used in English and French, in which the letters and are joined for the first ligature a ...

Afar language Afar is an Afroasiatic language belonging to the Cushitic branch, primarily spoken by the Afar people, native to parts of Djibouti, Eritrea and Ethiopia. It is an official language in Ethiopia; and a national language in Djibouti and Eritre ...

(ISO 639-1 language code aa) * Aa (Bengali), a Bengali letter

Measurements

* AA, a

bra size Bra size (also known as brassiere measurement or bust size) indicates the size characteristics of a bra to accurately fit the breasts. While there are a number of bra sizing systems in use around the world, the bra sizes usually consist of a numb ...

* 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 The AA battery (or double-A battery) is a standard size single cell cylindrical Dry cell, dry battery. ANSI and IEC battery nomenclature gives several designations for cells in this size, depending on cell features and chemistry. The Battery nom ...

size

Nature

* ''Aa'' (plant), a genus of orchid * ''Aa'' (snail), a subgenus of snail * Aā 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 (Proto-Germanic ) (ultimately from PIE ). The word has also been reduced to a frequent suffix in Alemannic and Austro-Bavarian topony ...

People

* Aa (surname), a Scandinavian surname, including a list of people with this name *

Van der Aa (surname) Van der Aa is a Dutch language, Dutch toponymic surname meaning "from the AA (disambiguation)#Rivers, 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), Du ...

, 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 The ...

, an architect in Ancient Egypt * Anthony Armstrong (writer) (1897–1972), Anglo-Canadian writer who used the pseudonym A.A. when writing for ''Punch'' *

Allu Arjun Allu Arjun (born 8 April 1982) is an Indian actor who works in Telugu cinema. He is one of the highest-paid actors in Indian cinemaand has been featured in ''Forbes Indias Celebrity 100 list since 2014. Allu Arjun's accolades include a Na ...

(born 1982), Indian actor, often abbreviated as AA in film titles

Places

* Aa, Estonia, a village and beach in Estonia * Aa, Indonesia, a populated place in the South Sulawesi province of Indonesia *

Albania Albania ( ; or ), officially the Republic of Albania (), is a country in Southeast Europe. It is located in the Balkans, on the Adriatic Sea, Adriatic and Ionian Seas within the Mediterranean Sea, and shares land borders with Montenegro to ...

, LOC MARC code *

Ann Arbor Ann Arbor is a city in Washtenaw County, Michigan, United States, and its county seat. The 2020 United States census, 2020 census recorded its population to be 123,851, making it the List of municipalities in Michigan, fifth-most populous cit ...

, a city in Michigan, United States of America *

Anne Arundel County Anne Arundel County (; ), also notated as AA or A.A. County, is located in the U.S. state of Maryland. As of the 2020 United States census, its population was 588,261, an increase of just under 10% since 2010. Its county seat is Annapolis, wh ...

, a county in Maryland, United States of America *

Antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean (also known as the Antarctic Ocean), it contains the geographic South Pole. ...

, WMO country code *

Aruba Aruba, officially the Country of Aruba, is a constituent island country within the Kingdom of the Netherlands, in the southern Caribbean Sea north of the Venezuelan peninsula of Paraguaná Peninsula, Paraguaná and northwest of Curaçao. In 19 ...

, FIPS country code

Rivers

Belgium

* Aa (Nete), in the province of Antwerp, tributary of the Nete

France

Aa (France) The Aa (; ) 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. The Aa ...

Germany

Aabach (Afte) The Aabach (also: ''Große Aa'') is a river in Germany, a left tributary of the river Afte. It rises near the village Madfeld, part of the town Brilon, in eastern North Rhine-Westphalia near the border with Hesse. From there it flows north betw ...

, formerly Große Aa, North Rhine-Westphalia * Aa (Möhne), North Rhine-Westphalia * Aa (Nethe), North Rhine-Westphalia * Aa (Werre), North Rhine-Westphalia * Bocholter Aa, North Rhine-Westphalia * Dreierwalder Aa, North Rhine-Westphalia *

Kleine Aa (Aabach) Kleine Aa (or the Little Aabach) is a river of North Rhine-Westphalia, Germany, a tributary of the Aabach. Thus it is part of the Rhine River Basin. The Kleine Aa rises in East Westphalia 7 km north of the border to Hesse, between Bad Wunne ...

, 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, North Rhine-Westphalia * Schaler Aa, Lower Saxony and North Rhine-Westphalia * Speller Aa, Lower Saxony and North Rhine-Westphalia * Steinfurter Aa, North Rhine-Westphalia

Netherlands

Aa (Meuse) The Aa () is a small river in the Netherlands. It rises near Nederweert in the southeastern province of Limburg, in the Peel region. It flows northwest through the province of North Brabant towards 's-Hertogenbosch, roughly along the Zuid-Willems ...

, North Brabant *

Aa of Weerijs The Aa of Weerijs (, lit. 'Aa or Weerijs') is a river in Belgium and Netherlands, where it arises from the confluence of the Great Aa (in Wuustwezel) and the Small Aa (in Brecht). In Breda (which means the ''broad Aa'') it is the river in the c ...

, North Brabant *

Drentsche Aa The Drentsche Aa () is a river rising in the Dutch province of Drenthe, flowing through Drenthe and for the last part the province of Groningen. It ends in the Schipsloot near Haren, which flows into the Noord-Willemskanaal; however, originally ...

, Drenthe and Groningen * , a river in Westerwolde, Groningen

Switzerland

Aabach (Aare) The Aare () or Aar () is the main tributary of the High Rhine (its discharge even exceeds that of the latter at their confluence) and the longest river that both rises and ends entirely within Switzerland. Its total length from its source to i ...

, a tributary of the Aare, in Aargau canton *

Aabach (Greifensee) The Aabach (also ''Aa'', or ''Ustermer Aa'' for disambiguation with the Mönchaltorfer Aa) is a minor river in the canton of Zürich, Switzerland. At a length of , it flows from Pfäffikersee to the Greifensee. Its valley is known as '' Aatal ...

or Ustermer Aa, in canton of Zürich * Aabach (Obersee), a tributary of Obersee (Zürichsee), in canton of St. Gallen *

Aabach (Seetal) The Aabach is a small river that runs through the Switzerland, Swiss cantons of Canton of Lucerne, Lucerne and Canton of Aargau, Aargau, in the Aare catchment area. It flows from south to north through the valley called Seetal (lit.: ''Lake Valley ...

, in the cantons of Lucerne and Aargau *

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 wit ...

, a tributary of Lake Sempach in the canton of Lucerne *

Engelberger Aa The Engelberger Aa (or ''Engelbergeraa'') is a river in Switzerland. It rises west of the Surenenpass in the Canton of Uri, flows through the valley of Engelberg ( Obwalden) and Nidwalden. At Buochs it flows into Lake Lucerne and is there ...

, in the cantons of Obwalden and Nidwalden * 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) The Sarner Aa is a long river in the Switzerland, Swiss canton of Obwalden. It drains the area to the eastern side of the Brünig Pass, flowing through the Lake Lungern, Lake Sarnen and the Wichelsee, before entering Lake Lucerne near Alpnach. It ...

, Obwalden, tributary of Lake Lucerne

Latvia

Gauja The Gauja River (, ) 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 (approximately one-fifth) are in Gauja National P ...

, Latvia, formerly known as ''Livländische Aa'' *

Lielupe The Lielupe ( in Latvian language, Latvian Literal translation, literally: ''Large River'', , ) is a river in central Latvia. Its length is (the length would reach if the Mēmele River were counted as part of the Lielupe). The surface area of ...

, Latvia, formerly known as ''Kurländische Aa''

Science and technology

AA amyloidosis AA amyloidosis is a form of amyloidosis, a disease characterized by the abnormal deposition of fibers of insoluble protein in the extracellular space of various tissues and organs. In AA amyloidosis, the deposited protein is serum amyloid A prote ...

Abstract algebra In mathematics, more specifically algebra, abstract algebra or modern algebra is the study of algebraic structures, which are set (mathematics), sets with specific operation (mathematics), operations acting on their elements. Algebraic structur ...

, a branch of mathematics * Anesthesiologist assistant, see certified anesthesiologist assistant *

Aplastic anemia Aplastic anemia (AA) is a severe hematologic condition in which the body fails to make blood cells in sufficient numbers. Normally, blood cells are produced in the bone marrow by stem cells that reside there, but patients with aplastic anemia ...

, a disease *

Arachidonic acid Arachidonic acid (AA, sometimes ARA) is a polyunsaturated omega−6 fatty acid 20:4(ω−6), or 20:4(5,8,11,14). It is a precursor in the formation of leukotrienes, prostaglandins, and thromboxanes. Together with omega−3 fatty acids an ...

, a polyunsaturated fatty acid * Advanced Architecture, later

Amiga Advanced Graphics Architecture Amiga Advanced Graphics Architecture (AGA) is the third-generation Amiga graphic chipset, first used in the Amiga 4000 in 1992. Before release AGA was codenamed Pandora by Commodore International. AGA was originally called AA for Advanced Archit ...

Atlas Autocode Atlas Autocode (AA)Original scans)) is a programming language developed around 1963 at the University of Manchester. A variant of the language ALGOL, it was developed by Tony Brooker and Derrick Morris for the Atlas computer. The initial AA and ...

, a computer programming language * AA,

Audible.com Audible is an American online audiobook and podcast service that allows users to purchase and stream audiobooks and other forms of spoken-word content. This content can be purchased individually or under a subscription model in which the user re ...

file format * Authoritative Answer bit, in DNS, a flag for a query answer * AA postulate of Euclidean geometry *

Anti-aircraft Anti-aircraft warfare (AAW) is the counter to aerial warfare and includes "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It encompasses surface-based, subsurface ( submarine-launched), and air-ba ...

, in military use * Attoampere (aA), 10⁻¹⁸

Ampere The ampere ( , ; symbol: A), often 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 ampere is equal to 1 c ...

, a unit of electric current * AA tree in computer science * Abbreviation for azidoazide azide * 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 and ASCI ...

* Japanese internet slang for Shift JIS art

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 (baseball), Triple-A. There are currently 30 teams classified at the Double-A level, one for each te ...

or Class AA, a Minor League Baseball classification level *

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 (baseball), National League (NL), founded in , the AA participated in an early version ...

, US baseball league *

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 ...

, US baseball league *

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 ...

, North American baseball league *

Athletics Australia Australian Athletics is the national sporting organisation (NSO) recognised by Australian Sports Commission for the sport of athletics in Australia. Founded in 1897, the organisation is responsible for administering a sport with over 16,000 reg ...

Amateur Athletic Union The Amateur Athletic Union (AAU) is an amateur sports organization based in the United States. A multi-sport organization, the AAU is dedicated exclusively to the promotion and development of amateur sports and physical fitness programs. It h ...

, US, since 1884

Transportation

AA Highway The AA Highway is a State highway (US), state highway maintained by the Kentucky Transportation Cabinet (KYTC) in the U.S. state of Kentucky. The mainline route parallels the Ohio River from Interstate 275 (Ohio–Indiana–Kentucky), Interstate ...

, Kentucky, US * Former

Ann Arbor Railroad (1895–1976) The Ann Arbor Railroad was an American railroad that operated between Toledo, Ohio, and Elberta, Michigan, Elberta and Frankfort, Michigan (about 294 route miles) with train ferry operations across Lake Michigan. In 1967 it reported 572 milli ...

, Ohio and Michigan *

Ann Arbor Railroad (1988) The Ann Arbor Railroad is a Class III railroad that operates fifty miles of track from Toledo, Ohio, to Ann Arbor, Michigan. The railroad is operated by Watco and is based in Howell, Michigan. Prior to Watco's purchase of the railroad in 2013, ...

, Ohio and Michigan * Former ''K'' line, New York City Subway, formerly "AA" * NZR A^A class, a New Zealand locomotive class * Ascend Airways

Other uses

Anna's Archive Anna's Archive is an open source search engine for shadow library, shadow libraries that was launched by Anna shortly after law enforcement efforts to Z-Library#United States, shut down Z-Library in 2022. The site aggregates records from major ...

, search engine for shadow libraries *

Asian Aerospace Asian Aerospace (AA) is an international trade fair A trade show, also known as trade fair, trade exhibition, or trade exposition, is an exhibition organized so that companies in a specific Industry (economics), industry can showcase and demons ...

, an air show in Asia *

European Union Association Agreement A European Union Association Agreement or simply Association Agreement (AA) is a treaty between the European Union (EU, or its predecessors), its Member States and a non-EU country or bloc of countries that governs bilateral relations. Areas freq ...

* Postal abbreviation for the United States armed forces in the Americas