| Abbreviation | Definition |
|---|---|
| IABCS | International Association of Bible Colleges and Seminaries |
| IABCS | International Association of Bible Colleges Seminaries |
| IAC | Iowa Agricultural College |
| IACAC | Illinois Association for College Admission Counseling |
| IACAC | Iowa Association for College Admission Counseling (Newton, IA) |
| IADC | Inter American Defense College |
| IBC | Illinois Benedictine College |
| IBC | International Business College |
| IBC | Isaac Breuer College |
| IBCM | International Business College Mitrovica |
| IBCS | International Baptist College and Seminary |
| IBEC | Isaac Bear Early College |
| IBIT | Institute for Business and Industry Training, North Central Michigan College |
| IBLT | Institute for Business, Law, and Technology, Touro College |
| IC | Imperial College |
| ICA | Intermediate And College Algebra |
| ICAA | Independent College Advancement Associates |
| ICAN | Iowa College Access Network |
| ICAP | Iowa College Americorps Program |
| ICB | International College Beijing |