| Acronym | Definition |
|---|
| IEI➣ICP Electronics, Inc. (Taiwan) |
| IEI➣Interrupt Enable Input |
| IEI➣International Energy Insurance |
| IEI➣Internacia Esperanto-Instituto (Esperanto: International Esperanto Institute) |
| IEI➣Institution of Engineers India |
| IEI➣Institution of Engineers of Ireland |
| IEI➣International Electronics Inc |
| IEI➣Ion Exchange India |
| IEI➣Iwashita Engineering, Inc. (Japan) |
| IEI➣International Epidemiology Institute |
| IEI➣Internal Electrical Installation |
| IEI➣Israel Export Institute |
| IEI➣Information Element Identifier (data marker) |
| IEI➣Imasen Electric Industrial (Japan) |
| IEI➣International Education Initiative (World Affairs Council) |
| IEI➣Indoor Environmental Institute |
| IEI➣Interrupt Enable Input (microprocessors) |
| IEI➣International Environmental Institute |
| IEI➣Invitation for Expression of Interest |