ATG

ATG may refer to:

• ATG, the triplet code for the amino acid methionine
• Anti-thymocyte globulin, antibodies to prevent and treat transplant rejection
• ATG Stores, an e-tail site
• Antigua and Barbuda, using its ISO 3166-1 alpha-3 country code
• Alexander the Great, king of Macedon, in northern Greece
• Adhesive Transfer Gun, the formal name for a tape gun
• Advanced Technology Group (Apple), a former division of Apple Computer
• Advanced Technology Group (Novell), a former division of Novell
• Aktiebolaget Trav och Galopp, the horse betting monopoly in Sweden
• Alaska Territorial Guard, a military reserve force in World War II
• Alternative Tourism Group, a Palestinian NGO
• Ambassador Theatre Group, a theatre group in the UK
• Anti-tank gun, a mobile weapon used against armoured vehicles
• Anti Tank Guitar, a string instrument
• Art Technology Group, a software developer
• Art Theatre Guild, a Japanese film production company
• At the Gates, a melodic death metal band
• Autophagy gene, gene coding for protein that facilitates autophagy (catabolic breakdown of unneeded or dysfunctional cellular constituents).
• Aviation Technology Group, the defunct developer of the Javelin Very Light Jet (VLJ)
• Auto-gating in night vision devices