| Abbreviation | Definition |
|---|---|
| HDAS | Huddersfield and District Archaeological Society |
| HDKI | Croatian Society of Chemical Engineers and Technologists |
| HDKI | Hrvatsko Druatvo Kemijskih In~enjera i Tehnologa |
| HDKI | Hrvatsko Društvo Kemijskih Inženjera i Tehnologa |
| HDKI | Hrvatsko Drutvo Kemijskih Inenjera i Tehnologa |
| HDMB | Croatian Society of Medical Biochemists |
| HDMB | Hrvatsko Druatvo Medicinskih Biokemi ara |
| HDMB | Hrvatsko Društvo Medicinskih Biokemicara |
| HDMB | Hrvatsko Drutvo Medicinskih Biokemiara |
| HDS | Houston Dressage Society |
| HDSA | Huntington's Disease Society of America |
| HDSN | Health and Development Society Nepal |
| HEALES | Healthy Life Extension Society |
| HEARTS | Health Education And Rural Training Society |
| HEAS | Harvard East Asia Society |
| HEAS | Hebrew Emigrant Aid Society |
| HEELS | Helping Educate and Empower Leaders in Society |
| HEOS | Huntsville Electro Optical Society |
| HEROS | Hockey Education Reaching Out Society |
| HES | Hebrew Educational Society |