| Abbreviation | Definition |
|---|---|
| IFCSC | Intercollegiate Fencing Conference of Southern California |
| IFDC | International Food Data Conference |
| IFFC | Indonesia Fintech Festival and Conference |
| IFFC | International Functional Food Conference |
| IFLC | IREM Fall Leadership Conference |
| IFRC | International Forum for Red Cross |
| IFSEC | International Fire and Security Exhibition and Conference |
| IFSEC | International Fire Security Exhibition and Conference |
| IFSF | International Free Software Forum |
| IGARSS | IEEE International Geoscience And Remote Sensing Symposium |
| IGBC | International Green Building Conference |
| IGEC | International Green Energy Conference |
| IGIC | IEEE Games Innovation Conference |
| IGIC | International Games Innovation Conferences |
| IGRC | Illinois Great Rivers Conference |
| IGSC | International Graduate Student Conference |
| IGWO | Integrated and Guided-Wave Optics Topical Meeting |
| IHHW | International Housing and Home Warranty |
| IHS | International Herpetological Symposium |
| IHTC | International Heat Transfer Conferences |