HAC

• Acetic acid
• Gorani language (Zaza-Gorani)
• Hachijojima Airport
• Hackney Downs railway station
• Hadassah Academic College
• Hague Academic Coalition
• Hakka Affairs Council
• Harrow Arts Centre
• Hazardous area classification
• Hectare
• High acid crude oil
• High-availability cluster
• Higher Attestation Commission
• Hokkaido Air System
• Honorary Air Commodore
• Honourable Artillery Company
• Hoosier Athletic Conference
• Hospital-acquired condition
• Hot Action Cop
• Hot adult contemporary
• House Appropriations Committee
• Hrvatske autoceste
• Hughes Aircraft Company
• Human artificial chromosome
• Humanist Association of Canada
• Humboldt Arts Council
• Hydra AC
• Hyles–Anderson College
• Hóquei Académico de Cambra
• Le Havre Athletic Club
• Newey–West HAC estimator
• Sudan Humanitarian Aid Commission
• hierarchical clustering
• naphthenic acid