• Antwerpse Gemologische Instelling
• Aeronautical & General Instruments Limited
• Advanced Graphic Imaging
• Advanced Generation Interface, a software company
• Alliance Graphique Internationale
• The Academy Group, Inc
• Adjusted Gross Income
• All Games Interactive, an online video game podcast
• Adventure Game Interpreter, used by Sierra On-Line in the 1980s
• Akademisches Gymnasium Innsbruck
• Alan Guttmacher Institute (now simply the Guttmacher Institute)
• American Geological Institute
• Analytical Graphics, a software company
• Artificial general intelligence
• Asrock Graphics Interface
• Association for Geographic Information
• Asterisk Gateway Interface
• Artist Group International
• American Gamelan Institute
• Agenzia Giornalistica Italia, an Italian news agency
• Auxiliary General Intelligence; A NATO military designation for sea-going vessels, usually trawlers, and typically of Russian/Soviet origin, that are used for intelligence gathering. See Spy ship.
• Silver iodide (AgI)

Agi may also refer to:

• An abbreviation for Agility in many games.
• Tadashi Agi, Japanese mangaka
• Agi, musician Long Kuan, former member of Mika Bomb

See also:

• Agai
• Agge
• Aggi
• Agii