| Abbreviation | Definition |
|---|---|
| IHO | International Humanitarian Organization |
| IIH | Institute for International Health |
| ILO | International Labor Organization |
| IMCO | International Maritime Consultative Organization |
| IMF | Imposing Misery And Famine |
| IMF | International Monetary Fund |
| IMF | It's Mostly Fiscal |
| IMF | nternational Monetary Fund |
| IMH | World Health Organization Institute of Mental Health |
| IMO | International Maritime Organization |
| IMUN | Indianapolis Model United Nations |
| IMUN | Island Model United Nations |
| INCB | International Narcotics Control Board |
| INES | International Nuclear Event Scale |
| INES | nternational Nuclear Event Scale |
| INGO | International Non-Governmental Organization |
| INGWE | Inter-Agency Network on Women and Gender Equality |
| INIS | International Nuclear Information System |
| INMUN | Intellectual Nepal Model United Nations |
| INRM | INdia Resident Mission |