| Abbreviation | Definition |
|---|---|
| IEAC | Independant Expert Advisory Committee |
| IEAC | Independent Expert Advisory Committee |
| IEAC | Indian Education Advisory Council |
| IEAC | International Education Advisory Committee |
| IFAB | Independent Fashion Advisory Board |
| IHAC | Information Highway Advisory Committee |
| IHAC | International Horsemans Advisory Committee |
| IHSAN | Islamic Homeschooling Support Advisory Network |
| IIAC | Income Inequality Advisory Committee |
| IIIA | II Information Advisory |
| ILHAC | Iowa Livestock Health Advisory Council (Iowa State University; Ames, IA) |
| IMAB | International Medical Advisory Board |
| IMAG | International Mailers Advisory Group |
| IMPAC | Industrial Marine Project Advisory Consultancy |
| INSARAG | International Search and Rescue Advisory Group |
| IOA | International Oversight Advisory |
| IPAC | Immunization Practices Advisory Committee |
| IPAC | International Parent Advisory Council |
| IPAT | Immunization Policy Advisory Team |
| IPCAA | International Pharmaceutical Congress Advisory Association |