| Abbreviation | Definition |
|---|---|
| IFIE | Ishikawa Foundation for International Exchange |
| IFLP | International Foundation and Language Programme |
| IFM | Interdisciplinary Foundations of Medicine |
| IFMBE | International Foundation for Medical and Biological Engineering |
| IFOC | Islamic Foundation Of Community |
| IFOJ | Intellectual Foundation of Jamaica |
| IFOL | Islamic Foundation of Lincoln |
| IFRS | International Financial Reporting Standards foundation |
| IFSS | Islamic Foundation Sunday School |
| IFSW | International Foundation of Social Workers |
| IFT | Islamic Foundation Trust |
| IFYM | International Foundation Year in Music |
| IGAF | Iowa Golf Association Foundation |
| IGF | International Guitar Foundation |
| IGFF | In Good Faith Foundation |
| IHF | International Humanity Foundation |
| IICF | Insurance Industry Charitable Foundations |
| IJCF | Illinois Jaycee Charitable Foundation |
| IJLF | Isaac Julian Legacy Foundation |
| ILEF | Inland Lakes Educational Foundation |