| Acronym | Definition |
|---|
| IELS➣Institute of English Language Studies |
| IELS➣Interactive English Learning System |
| IELS➣Institute for Environmental and Legal Studies (Mauritius) |
| IELS➣Integrated Electronic Licensing System (New Jersey Department of Environmental Protection; Division of Fish and Wildlife) |
| IELS➣Illinois Early Learning Standards (Illinois State Board of Education) |
| IELS➣Islington Education Library Service (London, England, UK) |