House Appropriations Committee Heading Alignment Cone Heading Alignment Cylinder Health Administration Center Hearing Aid Compatibility Helicopter Aircraft Commander high-alumina cement Hughes Aircraft Company human artificial chromosome hydrogen-assisted cracking Heading Alignment Center Heading Alignment Circle Heating/Air Conditioning High Altitude Compensator Honourable Artillery Company Hydrogenated Amorphous Carbon Habbo Advice Centre Hacienda Hague Arbitration Convention hair curling Harbor and Approach Chart Harvard Announcement Card Hazard Assessment Center Heading Adjustment Cylinder Hearing Aid Capability Hearing Aid Compatible Heat-Absorption Coefficient heat-acclimated Helicopter Active Control heliostat array control
House Appropriations Committee