AAT or Aat may refer to:

• Asia Airfreight Terminal, Hong Kong International Airport
• IATA airport code for Altay Xuedu Airport in Xinjiang Region, China
• Location identifier for Alturas Municipal Airport, California, United States

• Alpha 1-antitrypsin, also α1-antitrypsin (A1AT), a glycoprotein
• Aspartate transaminase, or aspartate aminotransferase, an enzyme
• AAT, a codon for the amino acid asparagine

• Achanalt railway station
• Ath, Belgium (Dutch: Aat)
• Australian Antarctic Territory
• AutoAlliance Thailand, a joint venture automobile manufacturing plant

• Anglo-Australian Telescope
• Animal-assisted therapy
• Apple Advanced Typography, a font rendering technology
• Aquatic Ape Theory, a theory in human evolution
• Ancient astronauts, or ancient astronaut theory

• Aat (queen), an ancient Egyptian queen consort of the 12th dynasty
• Administrative Appeals Tribunal, in Australia
• And Another Thing (disambiguation)
• Art & Architecture Thesaurus, a controlled vocabulary used for describing items of art
• Association of Accounting Technicians, a professional member body
• Arvanitika, a variety of Albanian spoken in Greece
• The Bible, An American Translation
• Armored Assault Tank, a Separatist tank in the prequel era of the Star Wars universe
• Hong Kong Academic Aptitude Test, a standardized examination from 1978 to 2000

• A80 (disambiguation)

This disambiguation page lists articles associated with the title AAT.
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