| Abbreviation | Definition |
|---|---|
| IEPDS | Information Exchange Package Documentations |
| IES | Institute of Educational Sciences |
| IES | International Exchange Site |
| IETD | Indo-European Telegraph Department |
| IETO | Interagency Environmental Technology Office |
| IF | Individually Funded |
| IFDI | Inward Foreign Direct Investment |
| IFG | Individual and Family Grant (FEMA) |
| IFM | Incremental Funding Methodology |
| IFO | Identified Flying Objects |
| IFPRI | International Food Policy Research Institute |
| IFT | Invitation For Tender |
| IGC | Inter-Governmental Consultation |
| IGG | The Inspector General Of Government |
| IGI | Intelligent Gathering of Information |
| IGO | Inter-Governmental Organization |
| IGOs | Inter-Governmental Organizations |
| IGS | International Gps Service |
| IH | In House |
| IHR | International Health Regulations |