| Abbreviation | Definition |
|---|---|
| IDF | Integrated Development Foundation |
| IDF | International Dairy Federation |
| IDF | International Development Foundation |
| IDF | International Diabetes Federation |
| IDFI | Institute for Development of Freedom of Information |
| IDFW | Institute for a Drug Free Workplace |
| IDLO | International Development Law Organization |
| IDOA | In Defense Of Animals |
| IDRA | International Disaster Recovery Association |
| IDRC | Illegal Dumping Resource Center |
| IDRF | India Development and Relief Fund |
| IDRF | International Development and Relief Foundation |
| IDRG | Inflammatory Disease Research Group |
| IDRG | Institut Dicziunari Rumantsch Grischun |
| IDRG | International Development and Relief Group |
| IDRI | Intercultural Development Research Institute |
| IDSA | Industrial Design Society Of America |
| IDSA | Interactive Digital Software Association |
| IDTP | International Doctors Training Programme |
| IEC | Inland Empire Coalition |