| Abbreviation | Definition |
|---|---|
| IEI | ICP Electronics Inc |
| IEI | Independent Environments Inc |
| IEI | Infrastructure Engineering Inc |
| IEI | International Enterprises Inc |
| IEICE | Institute of Electronics, Information and Communication Engineers |
| IEL | Inderscience Enterprises Limited |
| IEMC | Independent Environmental Monitoring Consultant |
| IEOC | International Egyptian Oil Company |
| IEOC | Italian Egyptian Oil Company |
| IEPC | International Electric Propulsion Conference |
| IEPC | Iowa Engineered Processes Corp |
| IEPL | Ikebana Electronics Pvt Ltd |
| IEPL | Indorama Eleme Petrochemicals Limited |
| IEPL | Interedwise Education Pvt Ltd |
| IEPL | Ixoraa Enterprise Pvt Ltd |
| IEPW | Industrail Ergonomics Process Workshop |
| IERE | International Electric Research Exchange |
| IES | Indian Engineering Service |
| IES | Interior Exterior Specialists Construction Group, Inc. |
| IESA | Infogrames Entertainment, S. A. |