- ACSG stands for Advanced Computer Solutions Group (various companies)
- ACSG stands for Allemande Courante Sarabande Gigue (Baroque music)
- ACSG stands for Austin Children’s Shelter Guild (Austin, TX)
- ACSG stands for Armament Computer Symbol Generator
- ACSG stands for Atlantic Coast S Gaugers, Inc (model railroad)
- ACSG stands for Association Canadienne des Sciences Géomatique (Ottawa, ON, Canada)
- ACSG stands for Association of Consortium Student Governments
- ACSG stands for Alternating Current Signal Generator
- ACSG stands for Air Conditioning Systems Group (Hitachi; Australia)
ACSG