| Abbreviation | Definition |
|---|---|
| HAA | Haunted Attraction Association |
| HAA | Havyaka Association of Americas |
| HAA | Home Academy Association |
| HAA | Houston Apartment Association |
| HAA | Houston Apartment Association's |
| HAAA | Hawaii Aquaculture and Aquaponics Association |
| HAAA | Hoagland Area Advancement Association |
| HAAE | Hungarian Association of Agricultural Economists |
| HAAR | HATTIESBURG Area Association of REALTORS |
| HAASA | Holland Alumni Association of South Africa |
| HAASA | Holland Alumni Association South Africa |
| HAAW | Hungarian American Association of Washington |
| HABA | Hawaii Association for Behavior Analysis |
| HABA | Hmong American Bar Association |
| HABA | Hoosier Association for Behavior Analysis |
| HABA | Houston Area Blacksmiths Association |
| HABA | Houston Area Blacksmith's Association |
| HABA | Houston Auto Body Association |
| HABE | Hartford Association for Business and Economics |
| HABLA | Hispanic American Business Leaders Association |