| Abbreviation | Definition |
|---|---|
| HPF | Horizon Project Foundation |
| HPPF | Healthy Public Policy Foundation |
| HRCF | Halim Razia Charitable Foundation |
| HRF | Health Research Foundation |
| HRF | Hudson River Foundation |
| HRF | Human Relief Foundation |
| HRF | Human Rights Foundation |
| HRF | Hunter Research Foundation |
| HRF | Hydro Research Foundation |
| HRFT | Human Rights Foundation of Turkey |
| HSEF | Hidden Sun Educational Foundation |
| HSF | HEP Software Foundation |
| HSF | Hidradenitis Suppurativa Foundation |
| HSF | Hillsboro Schools Foundation |
| HSF | Hillsborough Schools Foundation |
| HSF | Human Settlement Foundation |
| HSFA | Homeland Security Foundation of America |
| HSFM | Heart and Stroke Foundation of Manitoba |
| HSFO | Heart and Stroke Foundation of Ontario |
| HSGF | Homeland Study Group Foundation |