| Abbreviation | Definition |
|---|---|
| HACA | Haitian American Community Association |
| HACA | Hemophilia Association of the Capital Area |
| HACA | Houston Air Cargo Association |
| HACA | Houston Area Carriage Association |
| HACA | Hungarian American Cultural Association |
| HACCA | Heating And Cooling Contractors Association |
| HACD | Houston Association for Communication Disorders |
| HACM | Hawai i Association of Case Managers |
| HACM | Hawaii Association of case managers |
| HACR | Hispanic Association of Corporate Responsibility |
| HACR | Hispanic Association on Corporate Responsibility |
| HADA | Hawaii Automobile Dealers Association |
| HADA | Houston Automobile Dealers Association |
| HADA | Hudson Antiques Dealers Association |
| HADC | Hockey Association for the Developmentally Challenged |
| HAEA | Hempfield Area Education Association |
| HAEA | Hillsborough Art Education Association |
| HAEE | Hellenic Association For Energy |
| HAEE | Hellenic Association for Energy Economics |
| HAEE | Hellenic Association of Energy Economic |