| Acronym | Definition |
|---|
| IEP | Intensive English Program |
| IEP | Institut d'Etudes Politiques (French) |
| IEP | Institut für Europäische Politik |
| IEP | International Education Programs (Jacksonville University, Jacksonville, FL) |
| IEP | Irish Pound (old currency code; replaced by EUR) |
| IEP | Isoelectric Point |
| IEP | Instituto de Ecología Politica (Portuguese: Institute of Political Ecology; Chile) |
| IEP | Initial Enrollment Period (Medicare; US DHHS) |
| IEP | Immunoelectrophoresis |
| IEP | Interagency Ecological Program |
| IEP | International Exchange Program |
| IEP | Independent Energy Producers |
| IEP | International Electrotechnical Commission |
| IEP | Instituto das Estradas de Portugal |
| IEP | Immune Enhancement Project (San Francisco, CA) |
| IEP | In English, Please |
| IEP | Interpreter Education Program |
| IEP | Instituto Electrotécnico Português |
| IEP | International Education Policy |
| IEP | Intervalo entre Partos (Portuguese: Interval between Parties) |
| IEP | Institute of Engineers Pakistan (est. 1948) |
| IEP | Intergovernmental Enterprise Panel |
| IEP | Internationally Educated Professional (Canada) |
| IEP | Initial Election Period (US Medicare) |
| IEP | Inverse Eigenvalue Problem |
| IEP | Independent Evaluation Plan |
| IEP | Integrated Engineering Process |
| IEP | Independent Expert Panel |
| IEP | Internet Enabled Phone |
| IEP | Integrated Engineering Program |
| IEP | Initial Entry Party (first military HAZMAT reconnaissance in hot zone) |
| IEP | Internet Event Provider |
| IEP | Installation Engineering Plan |
| IEP | Information Exchange Program/Project |
| IEP | Interior Equivalent Problem |
| IEP | Inspection Éducation Primaire (French) |
| IEP | Immune Enhancing Peptide |
| IEP | Innovative Employee Programs |
| IEP | International Emotes Project (Internet emoticon project) |
| IEP | International Environmental Policy (various schools) |
| IEP | Individual(ized) Education Plan (aka Individual(ized) Education/al Program) |
| IEP | Intelligent Event Processor (software) |
| IEP | Institutional Effectiveness and Planning (various organizations) |
| IEP | Institutional Evaluation Programme (European University Association) |
| IEP | Internet Encyclopedia of Philosophy (est. 1995) |
| IEP | Institute for Environmental Policy (various locations) |
| IEP | Invasive Exotic Plant (various organizations) |