| Abbreviation | Definition |
|---|---|
| HAPS | Human Anatomy and Physiology Society |
| HARPS | Hooved Animal Rescue and Protection Society |
| HARS | Historical Aircraft Restoration Society |
| HAS | Hungarian Academy of Sciences |
| HAS | Magyar Tudományos Akadémia |
| HAS | Magyar Tudomnyos Akadmia |
| HASS | Health Awareness and Suvidha Society |
| HATZ | Academia Scientiarum Technicarum Croatica |
| HATZ | Akademija Tehni kih Znanosti Hrvatske |
| HATZ | Akademija Tehnickih Znanosti Hrvatske |
| HATZ | Akademija Tehnikih Znanosti Hrvatske |
| HATZ | Croatian Academy of Engineering |
| HAW | Heidelberg Academy of Sciences and Humanities |
| HAW | Heidelberger Akademie der Wissenschaften |
| HAZU | Croatian Academy of Sciences and Arts |
| HAZU | Hrvatska Akademija Znanosti i Umjetnosti |
| HBES | Human Behavior and Evolution Society |
| HBMS | Humboldt Bay Mycological Society |
| HBS | Historic Brass Society |
| HBSA | Hamilton Burlington Society of Architects |