| Abbreviation | Definition |
|---|---|
| ISEM | Institute for Superconducting Electronic Materials |
| ISEM | Institute of Sport and Exercise Medicine |
| ISEN | Institute for Sustainability and Energy at Northwestern |
| ISENSE | Institute for Sensing and Embedded Network Systems Engineering |
| ISER | Institute for Scientific and Engineering Research |
| ISER | Institute for Social and Economic Research |
| ISER | Institute for Systems Engineering Research |
| ISER | Institute of Social and Economic Research |
| ISF | Institute for Sustainable Futures |
| ISFD | Institute for Strategic Funding Development |
| ISGA | Institute for the Study of Global Anabaptism |
| ISGA | Institute of Security and Global Affairs |
| ISGB | Institute of Southern Georgian Bay |
| ISGE | Institute for Sustainable Global Engagement |
| ISGG | Institution Secondaire Gerard Gourgue |
| ISGP | Institute for Studies in Global Prosperity |
| ISGP | Institute on Science for Global Policy |
| ISGP | Institutional Strengthening of Gram Panchayats |
| ISHAR | Institute for the Study of Human Animal Relations |
| ISHES | Institute for Studies in Happiness Economy and Society |