| Acronym | Definition |
|---|
| IEN | Industrial Equipment News |
| IEN | Inspecteur de l'Éducation Nationale (French: Inspector of National Education) |
| IEN | Indigenous Environmental Network |
| IEN | Intelligent Emergency Network |
| IEN | Interrupt Enable Register |
| IEN | Internet Experiment Notes |
| IEN | Istituto Elettrotecnico Nazionale |
| IEN | Internet Experiment Note |
| IEN | Intraepithelial Neoplasia |
| IEN | Internet Engineering Notes (IETF) |
| IEN | Information Exchange Network |
| IEN | Integrated Enterprise Network (Hypercom) |
| IEN | Instituto Elettrotecnico Nazionale (Turin, Italy, time standard) |
| IEN | Inter-Exchange Network (Cisco) |
| IEN | Internal Engineering Notice (Pratt & Whitney) |
| IEN | In Each Nostril |