| Abbreviation | Definition |
|---|---|
| IISH | International Institute of Social History |
| IJMH | International Journal of Maritime History |
| ILY | I Like You >/////////// |
| IMAH | INDIGENOUS METHODOLOGIES and Art History |
| IMHA | International Maritime History Association |
| IMHC | International Mining History Congress |
| IMHM | Indiana Medical History Museum |
| IMHS | Internet Modern History Sourcebook |
| INHL | International Natural History League |
| INHP | Independence National Historical Park |
| IOM | Indians Of Montana |
| IRH | itial restart history |
| IRSHDC | Indian Residential School History & Dialogue Centre |
| ISCH | International Society for Cultural History |
| ISFHWE | International Society of Family History Writers Editors |
| ISHA | International Skiing History Association |
| ISHA | International Students of History Association |
| ISHAR | Integrative Studies Historical Archive and Repository |
| ISHM | International Society for the History of Medicine |
| ISHM | International Society for the History of the Map |