| Abbreviation | Definition |
|---|---|
| HHAF | Health Humanitarian Aid Foundation |
| HHAF | Humanitarian Health Aid Foundation |
| HHF | Haitian Health Foundation |
| HHF | Harold Hunter Foundation |
| HHF | Hearing Health Foundation |
| HHF | Hellenic Heritage Foundation |
| HHF | Hispanic Heritage Foundation |
| HHFS | Hope Hall Foundation School |
| HHI | Happy Hacker Industries |
| HHRF | Horses and Humans Research Foundation |
| HICF | Hatteras Island Cancer Foundation |
| HIF | Hokkaido International Foundation |
| HIF | Housing Industry Foundation |
| HIF | Hungary Initiatives Foundation |
| HIRF | Healey International Relief Foundation |
| HIRF | Hole in the Rock Foundation |
| HISF | Honjo International Scholarship Foundation |
| HJF | Henry M Jackson Foundation |
| HKCF | Historic Kansas City Foundation |
| HKF | Helena Kennedy Foundation |