| Abbreviation | Definition |
|---|---|
| ISHM | Institute for Safety and Health Management |
| ISHR | Institute for the Study of Human Rights |
| ISHR | Institute of Scottish Historical Research |
| ISI | Indian Standard Institute |
| ISI | Indian Standards Institution |
| ISI | Information Security Institute |
| ISI | Institute For Sustainable Infrastructure |
| ISI | Intercollegiate Studies Institute |
| ISI | International Statistical Institute |
| ISIAC | Institute for the Study of International Aspects of Competition |
| ISIB | Indian Statistical Institute Bangalore |
| ISIB | International Summer Institute at Bentley |
| ISIC | Institute for Scientific Information on Coffee |
| ISID | Indian Statistical Institute Delhi |
| ISID | Institute for Studies in Industrial Development |
| ISID | Institute for the |
| ISID | Institute for the Study of International Development |
| ISIG | Institute for Sustainable Innovation and Growth |
| ISIM | Institute for the Study of International Migration |
| ISIP | Institute for Signal and Information Processing |