| Acronym | Definition |
|---|
| IEEC➣Institut d'Estudis Espacials de Catalunya (Catalonian Institute of Space Studies) |
| IEEC➣Integral-Equation Equivalent Circuit (electronics) |
| IEEC➣Integrated Electronics Engineering Center (Binghamton University; Binghamton, NY) |
| IEEC➣International Entrepreneurship Educators Conference (UK) |
| IEEC➣Inphone Electronics Enterprise Co., Ltd. (Taiwan) |
| IEEC➣Inland Empire Energy Center, LLC (power plant; Romoland, CA) |
| IEEC➣Inner Enamel Epithelial Cell |