| Acronym | Definition |
|---|
| ISEP | Instituto Superior de Engenharia do Porto |
| ISEP | International Student Exchange Program |
| ISEP | Institut Supérieur d'Electronique de Paris |
| ISEP | Institute for Sustainable Energy Policies (Japan) |
| ISEP | International Society for Environmental Protection |
| ISEP | International Society for Evolutionary Protistology (Canada) |
| ISEP | It's Someone Else's Problem |
| ISEP | Interim Tactical ELINT Processor |
| ISEP | International Society of Education Planners |
| ISEP | Integrated Safety Evaluation Program |
| ISEP | Institute for Strategic Energy Planning (Japan) |