IPEN
| Acronym | Definition |
|---|---|
| IPEN | International POPs (Persistent Organic Pollutant) Elimination Network |
| IPEN | Instituto Peruano de Energía Nuclear (Peruvian Nuclear Energy Institute) |
| IPEN | Instituto Peruano de Energía Nuclear (Peru) |
| IPEN | International Program Evaluation Network (conference) |
| IPEN | Intellectual Property Enforcement Network |
| IPEN | International Private Equity Network (various locations) |