AGC
- A Great Chaos
- AGC Inc.
- Adjutant General's Corps
- Agatu language
- Agra Cantonment railway station
- Allegheny County Airport
- Amphibious Command Ship
- Apollo Guidance Computer
- Apostolic Generation Church
- Army Geospatial Center
- Associated General Contractors of America
- Associated Gospel Churches of Canada
- Assyrian General Conference
- Attorney General of California
- Attorney General of Canada
- Attorney General of Colombia
- Attorney General of Colorado
- Attorney General of Connecticut
- Auditor General of Canada
- Auditor General of China
- Auditor General of Colombia
- Australian Guarantee Corporation
- Automated Guided Vehicle
- Automatic gain control
- Automatic generation control
- Automotive fuse
- Autorail à grande capacité
- Bethesda system
- List of United States Navy amphibious warfare ships