| IEN | Internet Experiment Notes | 互联网试验注释 |
| IEN | Istituto Elettrotecnico Nazionale | 国家电力局 |
| IEN | Integrated Enterprise Network (Hypercom) | 集成企业网络(Hypercom) |
| IEN | Internet Engineering Notes (IETF) | 互联网工程笔记(IETF) |
| IEN | Internet Experiment Note | 互联网实验笔记 |
| IEN | Inter-Exchange Network (Cisco) | 交换间网络(思科) |
| IEN | Internal Engineering Notice (Pratt & Whitney) | 内部工程通知(Pratt &惠特尼) |
| IEN | Information Exchange Network | 信息交换网络 |
| IEN | Indigenous Environmental Network | 土著环保联盟 |
| IEN | Intraepithelial Neoplasia | 上皮内肿瘤 |
| IEN | In Each Nostril | 在每个鼻梁中 |
| IEN | Inspection de l'Education Nationale (France) | 检查de fixation 'Education图书馆(法国) |
| IEN | Instituto Elettrotecnico Nazionale (Turin, Italy, time standard) | 国家电力研究所(意大利都灵,时间标准) |
| IEN | Industrial Equipment News | 工业设备新闻 |
| IEN | Imperial Elven Navy | 帝国精灵海军 |
| IEN | Instituto de Estudios de la EnergÍa | Instituto de Estudios de la EnergÍa |