Iat is a minor ancient Egyptian goddess.

The abbreviation IAT may refer to:

Organisations

• Immigration Appeal Tribunal
• Indonesia Air Transport, an Indonesian airline
• Institut aérotechnique, a French research Institute in aerodynamics
• Institute for Affordable Transportation, an American organization
• Institute of Armament Technology, now the Defence Institute of Advanced Technology, an Indian defense institution
• International Association of Trichologists
• Institute of Agricultural Technology, the former name of Kelappaji College of Agricultural Engineering and Technology

Science and technology

• Implicit-association test, a measure within social psychology
• Import Address Table, in computer programming
• Indicated air temperature
• Indirect antiglobulin test, a clinical blood test
• Information access technology
• Intake air temperature
• International Atomic Time
• Information Assurance Technical, a category for Certified Information Systems Security Professional

Other uses

• Indigenous Aryan Theory
• International ACH Transaction, a code used by the Automated Clearing House
• International Appalachian Trail, a hiking trail in the United States
• IISER Aptitude Test, an annual academic examination in India
• Iwate Asahi Television, a Japanese television station
• International Air Tattoo, the former name of a British air show