| Abbreviation | Definition |
|---|---|
| IACI | Irish American Cultural Institute |
| IACM | International Association of Customs Museums |
| IAMA | international Art Museum of America |
| IAMM | Islamic Arts Museum Malaysia |
| IBMM | International Bluegrass Music Museum |
| IBMM | Int'l Bluegrass Music Museum |
| ICA | Intermuseum Conservation Association |
| ICAM | International Confederation of Architectural Museums |
| ICLM | International Committee for Literary Museums |
| ICME | International Committee for Museums of Ethnography |
| ICMM | International Congress of Maritime Museums |
| ICMS | International Committee for Museum Security |
| ICN | Instituut Collectie Nederland |
| ICOM | International Council Of Museums |
| ICUD | Index to Current Urban Documents |
| IGTM | Indigo Girls Tour Museum |
| ILHM | Irish Labour History Museum |
| IMA | Indianapolis Museum of Art |
| IMA | Iwate Museum of Art |
| IMAS | International Museum of Art and Science |