| Acronym | Definition |
|---|
| ISSH➣Idaho State School and Hospital (Nampa, ID) |
| ISSH➣International School of the Sacred Heart (Tokyo, Japan) |
| ISSH➣International Symposium on Stochastic Hydraulics (est. 1972) |
| ISSH➣Instituti I Sigurimeve Shoqërore (Albanian: Social Insurance Institute) |
| ISSH➣Indian Standard Sheet (steel construction) |
| ISSH➣In Situ Suppression Hybridization |