Initialism of Alcoholics Anonymous: a self-supporting organization of alcoholic people. • Initialism of Academy Awards: a recognition of excellence in cinematic achievements, given annually by the Academy of Motion Picture Arts and Sciences. • Initialism of Addicts Anonymous. • Initialism of Al Ain. • Initialism of American Airlines: a major American airline headquartered in Fort Worth, Texas. • Initialism of Aerolíneas Argentinas. • Initialism of Ansett Australia or Ansett Airways. • Initialism of Air Almanac, a publication. • Initialism of American Anthropologist: the flagship journal of the American Anthropological Association, founded in 1888. • Initialism of Acta Astronautica: a scientific journal founded in 1955, covering fields related to the peaceful scientific exploration of space. • Initialism of Aluminum America, a corporation. • Initialism of The Aluminum Association: a trade association for the aluminum production, fabrication and recycling industries. • Double-A: the second-highest level of play in Minor League Baseball after Triple-A (AAA). • Initialism of American Association: an American minor league baseball league from 1902 to 1962 and 1969 to 1997. • Initialism of The Automobile Association: a British motoring association founded in 1905. • Initialism of Alzheimer's Association: an American volunteer health organization focusing on care, support and research for Alzheimer's disease. • Initialism of Amalgamated Association of Iron and Steel Workers. • Initialism of Ann Arbor Railroad. • Initialism of Arlington Annex. • USPS military code of Armed Forces – Americas. • Initialism of Army Act. • Initialism of aviatsionnaya Armiya. • Initialism of Antiproton Accumulator: an infrastructure connected to the Proton–Antiproton Collider at CERN. • Alternative form of A∴A∴. • Initialism of Anna's Archive. • Abbreviation of Alcoa.