| Acronym | Definition |
|---|
| IHRO➣International Human Rights Observer |
| IHRO➣International Human Rights Organization |
| IHRO➣International Human Rights Observatory |
| IHRO➣International Historic Racing Organization (est. 1985) |
| IHRO➣Independent Human Rights Organization |
| IHRO➣International Humanitarian Relief Operations |
| IHRO➣Intrinsic Heart Rate Observed |