AAT

AAT or Aat may refer to:

Aviation

 * Asia Airfreight Terminal, Hong Kong International Airport
 * Altay Airport, Xinjiang, China
 * Location identifier for Alturas Municipal Airport, California, United States

Biochemistry

 * Alpha 1-antitrypsin, also α1-antitrypsin (A1AT), a glycoprotein
 * Aspartate transaminase, or Aspartate Aminotransferase, an enzyme
 * AAT, a codon for the amino acid Asparagine

Places

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

Science

 * Anglo-Australian Telescope
 * Animal-assisted therapy
 * Aquatic Ape Theory, a theory in human evolution
 * Ancient Astronauts; or Ancient Astronaut Theory

Technology

 * Apple Advanced Typography, a font rendering technology

Other uses

 * 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.
 * Arvanitika, a variety of Albanian spoken in Greece
 * Association of Accounting Technicians
 * 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