ACG

• A codon of threonine in genome expression
• Acoustocerebrography, a transcranial acoustic diagnostic method
• Alternating current generator, a type of electric generator
• American College of Gastroenterology, a professional association of gastroenterologists
• Angiocardiography, contrast radiography of the heart and great vessels
• Angle closure glaucoma, a type of glaucoma
• Anterior cingulate gyrus, a part of the cingulate cortex
• Apexcardiogram, a graphical recording of the pulsations of the chest wall over the apex of the heart

• Acocks Green railway station, in the UK, from its National Railway code
• Área de Conservación Guanacaste, a network of protected areas and a World Heritage site in northwestern Costa Rica
• Azeri-Chirag-Guneshli, an oilfield in the Caspian Sea

• Academic Colleges Group, a New Zealand Educational Company
• Air Cargo Germany, a former cargo airline
• The Air Combat Group RAAF of the Royal Australian Air Force
• American College for Girls, now called Robert College, of Istanbul
• American College of Greece, an academic institution in Greece
• Associated Carrier Group, a US industry association of CDMA cellular network operators
• Association for Corporate Growth, an organization providing a global community for mergers and acquisitions and corporate growth professionals

• ACG (subculture), Animation, Comics, and Games subculture in Greater China
• American Comics Group, a comic-book publisher in the Golden Age of comic books
• Ashby Computers & Graphics, video game developer trading as Ultimate Play the Game
• A Core Game, a Roblox "core" game.

• Academic Competitiveness Grant, an assistance grant for college students in the US
• Atlético Clube Goianiense, is a Brazilian football team
• All Conditions Gear (ACG), a Nike subdivision

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