AAT
AAT stands for:
- α-1-antitrypsin , a protein
- Aachen aphasia test , procedure for diagnosing aphasia
- Alber Antriebstechnik GmbH
- Altay Airport (IATA code) in Xinjiang / China
- Anglo-Australian Telescope, see List of Largest Optical Telescopes
- Anti-aggressiveness training
- Apple Advanced Typography , typographic concept under MacOS
- Art and Architecture Thesaurus , thesaurus for indexing objects in art and cultural history collections
- Australian Antarctic Territory
Aat stands for:
- Aat, Dutch name for the Belgian city of Ath
- Aat (queen) , ancient Egyptian queen
aat stands for:
- Arvanitika (ISO-639-3 code), Albanian dialect spoken only to a limited extent in Greece
