| Abbreviation | Definition |
|---|---|
| ISEE | International Society for Ecological Economics |
| ISEE | International Society of Explosives Engineers |
| ISEM | Institute for Structural and Engineering Materials |
| ISEM | International Society of Environmental Medicine |
| ISES | International Special Events Society |
| ISESSAH | International Society for Economics and Social Sciences of Animal Health |
| ISET | International Symposium on Endovascular Therapy |
| ISFS | Information Security and Forensics Society |
| ISFS | International Student and Faculty Services |
| ISG | Innovative Strategic Growth |
| ISHA | Indian Speech and Hearing Association |
| ISHRAE | Indian Society of Heating Refrigerating and Air Conditioning Engineers |
| ISID | International Society of Interior Designers |
| ISIL | Indian Society of International Law |
| ISIL | Irish Society of International Law |
| ISIP | Italian Society of Investment Professionals |
| ISLA | International Sport Lawyers Association |
| ISM | Incorporated Society of Musicians |
| ISMA | International Securities Market Association |
| ISMD | International Society for Markets and Development |