| Acronym | Definition |
|---|
| IIES | Institute for International Economic Studies (Stockholm University, Sweden) |
| IIES | Instituto de Investigaciones Económicas y Sociales |
| IIES | Institute for International Energy Studies (Iran) |
| IIES | Instituto de Informática e Estatística da Solidariedade |
| IIES | Insurance Information & Enforcement System (New York state government) |
| IIES | Isolation and Integration in Embedded Systems (Workshop) |
| IIES | Institute for Interdisciplinary Engineering Studies (Purdue University) |
| IIES | Incubadora Internacional de Empresas de Software |
| IIES | Internet Insurance Education Services |
| IIES | Intelligent Inquiry Educational Society |
| IIES | Indian Industrial Exposition & Seminar |
| IIES | Internet Interest and Experience Survey |