| Abbreviation | Definition |
|---|---|
| HAC | Heritage Advisory Committee |
| HAC | Historical Advisory Committee |
| HACCA | HIV and AIDS Coordination Committee of Afghanistan |
| HANAC | Hellenic American Neighborhood Action Committee |
| HASC | Home Affairs Select Committee |
| HASC | House Armed Services Committee |
| HCC | Headquarters Committee on Contracts |
| HCCP | Hackettstown Committee for Crime Prevention |
| HCDC | Housing and Community Development Committee |
| HCDC | Hunterdon County Democratic Committee |
| HCOC | Housing Constraints and Opportunities Committee |
| HCPAC | Habitat Conservation Plan Advisory Committee (Florida) |
| HCPAC | Health Care Professional Advisory Committee (American Medical Association) |
| HCPAC | House of Commons Public Accounts Committee (UK) |
| HDAC | Historic District Advisory Committee |
| HDAC | Housestaff Diversity Advisory Committee |
| HDRC | Higher Degree Research Committee |
| HDRC | Historic District Review Committee |
| HDTC | Hopkinton Democratic Town Committee |
| HEAC | Health Equity Advisory Committee |