| Acronym | Definition |
|---|
| IIHS➣Insurance Institute for Highway Safety (Arlington, VA) |
| IIHS➣Insurance Institute for Highway Safety |
| IIHS➣Institute of Integral Handwriting Studies |
| IIHS➣International Institute of Health Studies (Ottawa, Canada) |
| IIHS➣International Infant Hydrocephalus Study |
| IIHS➣Incheon International High School (South Korea) |