| ICNND | Interdepartmental Committee on Nutrition in National Defense |
|---|---|
| ICPI | Intersociety Committee on Pathology Information |
| IHAC | Industrial Health and Advisory Committee |
| ITC | imidazolyl-thioguanine chemotherapy; Interagency Testing Committee; in the canal [hearing aid] |
| JCAE | Joint Committee on Atomic Energy |