| Abbreviation | Definition |
|---|---|
| IPEN | International Pollutant Elimination Network |
| IPL | Immigrant Protective League |
| IPL | International Primate Protection League |
| IPMA | International Project Management Association |
| IPMI | International Precious Metals Institute |
| IPMP | International Peer Mentor Program |
| IPOA | International Peace Operations Association |
| IPP | International Peoples Project |
| IPP | International People's Project |
| IPPL | International Primate Protection League |
| IPPM | The Institute Of Payroll And Pensions Management |
| IPPR | Institute For Public Policy Research |
| IPRA | Independent Petroleum Retailer Association |
| IPRA | International Peace Research Association |
| IPRC | Indiana Prevention Resource Center |
| IPRC | International Peace Resource Center |
| IPS | International Peatland Society |
| IPSL | International Partnership for Service- Learning |
| IPS-L | International Partnership for Service- Learning |
| IPTA | Illinois Physical Therapy Association |