| Acronym | Definition |
|---|
| HAB | Hot Air Balloon |
| HAB | Herzog August Bibliothek (library; Wolfenbüttel, Germany) |
| HAB | Habakkuk |
| HAB | Habitação (Portuguese: tenement; postal usage) |
| HAB | HIV/AIDS Bureau (US HRSA) |
| HAB | Harmful Algal Bloom |
| HAB | Hokuriku Asahi Broadcasting (Japan) |
| HAB | Home Affairs Bureau (Hong Kong) |
| HAB | Honda Automoveis do Brasil (Portuguese: Honda Automobiles of Brazil; Brazil) |
| HAB | Husbands and Boyfriends |
| HAB | Habitability |
| HAB | Have a Blast |
| HAB | Hostile Action Based |
| HAB | Habitation Module (Shuttle/Space Station) |
| HAB | Healthcare Advisory Board (various organizations) |
| HAB | Heavy Assault Bridge |
| HAB | Hass Avocado Board |
| HAB | Hot And Bothered |
| HAB | Hospital Advisory Board (various locations) |
| HAB | Hanford Advisory Board |
| HAB | Hot Asian Babe |
| HAB | Hearing Aid Bank (various locations) |
| HAB | Horn of Africa Bulletin |
| HAB | Hospital Acquired Bacterameia |
| HAB | High Altitude Burst |
| HAB | High-Alumina Basalt |
| HAB | Hawaii Association of the Blind |
| HAB | Housing Assistance Bureau (Montana Department of Commerce) |
| HAB | High Availability Board |
| HAB | Hot American Babe |