ATT

ATT may refer to:

• AT&T (disambiguation)
  • AT&T Inc., an American telecommunications company founded 1983 (formerly Southwestern Bell or SBC Communications)
  • AT&T Corporation, the original AT&T founded 1885 (formerly American Telephone & Telegraph), purchased by SBC in 2005
  • AT&T Mobility, a subsidiary of AT&T Inc. for wireless services.
  • AT&T Mexico, an international wireless subsidiary of AT&T Inc
• Aircraft Transport and Travel, a 1910s British airline
• Amadou Toumani Touré, president of Mali
• American Tobacco Trail
• American Top Team, a mixed martial arts team based in Coconut Creek, Florida.
• Arms Trade Treaty, a 2014 multilateral treaty to control the illicit trade of conventional weapons
• Association of Taxation Technicians, a United Kingdom professional association
• ATI Tray Tools - freeware program developed by Ray Adams for ATI Radeon video cards
• Atmautluak Airport, an airport in Alaska (IATA: ATT)
• A.T.T., a British dance music act.
• Attachment, in biology (the binding of a virus to its target cell)
• Attadale railway station, United Kingdom (National Rail code)
• Attitude, in dynamics (aircraft attitude)
• Attorney at law
• Authorization to Transport, a permit issued in Canada to transport Restricted and Prohibited firearms
• ATT, a codon for the amino acid isoleucine