| Abbreviation | Definition |
|---|---|
| IEPB | Institute of Evolutionary Physiology and Biochemistry |
| IEPI | Instituo Ecuatoriano de Propiedad Intelectual |
| IEPI | Instituto Ecuatoriano de la Propiedad Intelectual |
| IEPO | Instituto de Ensino e Pesquisa Objetivo |
| IEPP | Instituto de Ensino e Pesquisa em Psicoterapia |
| IEPW | Institute of Exercise Physiology and Wellness |
| IER | Instructor Effectiveness Rating |
| IES | Institute for Environmental Science |
| IES | Institute for Experimental Studies |
| IES | Institute of Economic Studies |
| IES | Institute of Ecosystem Studies |
| IES | Intensive English Studies |
| IESA | Instituto de Estudios Superiores de Administracion |
| IESD | Institute for Entrepreneurial Studies and Development, University of Central Missouri |
| IESD | Institute of Energy and Sustainable Development |
| IESD | Institute of Environment for Sustainable Development, Tongji University |
| IESE | Institute of Earth Science and Engineering (New Zealand) |
| IESG | Instructional & Electronics Support Group - UC Berkeley |
| IESL | Institute for the Empirical Study of Language |
| IESL | Institute of Electronic Structure and Laser |