| Abbreviation | Definition |
|---|---|
| IMAS | International Museum of Art Science |
| IMCC | International Museum Construction Congress |
| IMH | International Museum of the Horse |
| IMJ | Israel Museum Jerusalem |
| IMLS | Institute of Museum and Library Science |
| IMMA | Irish Museum Of Modern Art |
| IMOCA | Independent Museum of Contemporary Arts |
| IMOCA | Indianapolis Museum of Contemporary Art |
| IMOCA | Irish Museum of Contemporary Art |
| IMS | Institute of Museum Services |
| IMSS | International Museum of Surgical Science |
| IMTM | International Monster Truck Museum |
| IMW | International Museums Weekend |
| IMWC | Insect Museum of West China |
| INC | Indigenous Narratives Collective |
| INMP | International Network of Museums for Peace |
| IOP | Izu Oceanic Park |
| IPAM | International Partnerships Among Museums |
| IPF | Interchangeable Preservation Format |
| IRM | Illinois Railway Museum |