AA

The two-letter acronym AA has several variants and multiple meanings. The variants include A∴A∴, Aa, 'A'a, aa and aA.

1 AA
2 A∴A∴
3 Aa
4 'A'a
5 aA
6 aa

AA:

• AA, one of the standard sizes for dry cell batteries - Often pronounced "Double A"
• Ace-Ace, indicating a pair of aces in a poker hand
• Aerolíneas Argentinas, an Argentine airline (whose IATA airline designator is AR)
• Affirmative action, a policy of providing advantages to minority groups that have traditionally been discriminated against
• the stock symbol for the American aluminum producer Alcoa
• Alcoholics Anonymous, a worldwide fellowship of persons recovering from alcoholism
• the IATA airline designator for American Airlines, one of the world's largest airlines
• American Atheists, an organization which aims to defend the civil liberties of atheists
• America's Army, a first-person shooter computer game financed and owned by the U.S. government
• Anime Academy, an anime review website
• Ann Arbor Railroad (United States) (AAR reporting mark AA), connecting Ann Arbor, Michigan and Toledo, Ohio
• Anti-aircraft warfare, any method of engaging military aircraft in combat from the ground
• Anti-aliasing, the technique of minimizing aliasing when representing a high-resolution signal at a lower resolution
• Armed Forces Americas, a United states postal delivery domain, as the postal abbreviation for military locations in the Americas, excluding Canada
• the DAFIF 0413 / DIA 65-18 / FIPS PUB 10-4 territory code for Aruba
• ASCII art, an artistic medium in which pictures are composed of symbols taken from the ASCII computer character set
• Associate of Arts (or Associate in Arts), a type of Associate's degree
• The Automobile Association, a British motoring organisation
• The Automobile Association, an Irish motoring organisation
• AA may also be used within a country to refer to the Automobile Association of that country, for example the New Zealand Automobile Association
• Class AA, a level in the Farm System of minor league baseball
• Shift-JIS art, an artitistic medium in which pictures are composed of symbols taken from an extended version of the ASCII computer character set.
• Aa, a village on northern coast of Estonia
• Aa, a Mother goddess
• Aa, a genus of orchid
• Å, as an alternative transcription of this a letter found in the Swedish, Norwegian, Danish and other alphabets
• Aa River (or Å River), the name of several waterways in Europe

aA;

• attoampere, an SI unit of electrical current
• Abampere the unit of current in the CGS electromagnetic system of units (emu)

aa;

• Afar language (ISO 639 alpha-2, aa)
• Authoritative Answer, in DNS a flag for query answer