| IEEC | Illawarra Environmental Education Centre 
| Others |
| IEEC | Industrial Energy Equipment Co
| Others |
| IEEC | Inland Empire Energy Center
| Others |
| IEEC | Inner Enamel Epithelial Cell
| Others |
| IEEC | Innovation And Engineering Excellence Centre
| Others |
| IEEC | Innovation Engineering Excellence Centre
| Others |
| IEEC | Institutional Educational Evaluation Committee
| Others |
| IEEC | Instituto Electoral del Estado de Campeche
| Others |
| IEEC | Integral Equation Equivalent Circuit
| Others |
| IEEC | Integrated Electronics Engineering Center
| Others |
| IEEC | Interagency Energy Efficiency Committee
| Others |
| IEEC | International Early Engines Conference
| Others |
| IEEC | International Education Exchange Council
| Others |
| IEEC | International Electoral Education Council
| Others |
| IEEC | International Employability Education Council
| Others |
| IEEC | International Energy Efficiency Certificate
| Others |
| IEEC | International Entrepreneurship Educators Conference
| Others |
| IEEC | International Ethiopian Evangelical Church
| Others |