| Abbreviation | Definition |
|---|---|
| HTF | Haitian Timoun Foundation |
| HTF | Healthcare Technology Foundation |
| HTF | Hello Tomorrow Foundation |
| HTFI | Handang Tumulong Foundation Inc |
| HTLF | Houston Trial Lawyers Foundation |
| HTRF | Hunter Transplant Research Foundation |
| HTWF | Heal The World Foundation |
| HVSF | Hungarian Volunteer Sending Foundation |
| HWF | Historic Waco Foundation |
| HWF | Historic Wilmington Foundation |
| HWK | Hanse-Wissenschaftskolleg |
| IAAF | International Amateur Athletic Foundation |
| IADAF | Israel Anti Drug Abuse Foundation |
| IADF | Inter American Defense Foundation |
| IAF | Information Accountability Foundation |
| IAF | Intefaith Alliance Foundation |
| IAF | International Aquaculture Foundation |
| IAF | International Athletics Foundation |
| IAF | Irish Architecture Foundation |
| IAF | The Industrial Areas Foundation |