DAT

• Direct agglutination test, any test that uses whole organisms as a means of looking for serum antibody
• Direct antiglobulin test, one of two Coombs tests
• Dopamine transporter or dopamine active transporter, a membrane-spanning protein

• Dental Admission Test, taken by dental school candidates the US and Canada
• Design and Technology, school subject in primary and secondary school

• .dat, computer filename extension, typically for a file considered to contain data
• dat (software), a decentralized data tool for distributing data small and large.
• DAT Solutions, or Dial-A-Truck, provider of electronic transportation information
• Digital Audio Tape, an audio recording and playback medium
• Double acting tanker, a type of icebreaking tanker ship
• Dynamic Acceleration Technology, increases single-threaded performance on multi-core processors
• Dynamic Address Translation, IBM's term for virtual memory mapping: Virtual memory#History

• DAT Danish Air Transport, an airline based in Vamdrup, Denmark
• Datong Yungang International Airport, an airport with the IATA code of DAT in Shanxi Province, China
• DAT, the ICAO code for Canadian airline Lynx Air
• DAT, the National Rail code for Datchet railway station in the county of Berkshire, UK
• Delta Air Transport, former Belgian airline
• Delivered at Terminal, a former Incoterms term whereby the seller pays all transport costs

• Day After Tomorrow (band), a 3-member J-pop band under the Avex label
• Dat (song), a song written and recorded by Pluto Shervington
• DAT (newspaper), a Kazakh news source

• Abbreviation for grammatical dative case
• Desk appearance ticket, a New York order to appear in criminal court
• Disaster Action Team, the local disaster response unit of the American Red Cross
• Drug action teams, involved in applying UK drugs policy
• Dolphin-assisted therapy, swimming with dolphins as a therapy
• DAT (chemotherapy) is a regimen that consists of Daunorubicin, Ara-C (cytarabine) and Thioguanine
• Divergent Association Test (DAT) is a psychological creativity test
• DAT ({{langx|uk|Державне акціонерне товариство}}), a type of Ukrainian legal entity

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