| Abbreviation | Definition |
|---|---|
| IPA | Union internationale des éditeurs |
| IPC | Institute for Interconnecting and Packaging Electronic Circuits |
| IPENZ | Institution of Professional Engineers New Zealand |
| IPES | International Perspectives on Education and Society |
| IPFS | Indo Portuguese Friendship Society |
| IPGS | Imperial Polk Genealogical Society |
| IPH | Association Internationale des Historiens du Papier |
| IPH | International Association of Paper Historians |
| IPH | Internationale Arbeitsgemeinschaft der Papier Historiker |
| IPKIN | Ikatan Profesi Komputer dan Informatika Indonesia |
| IPKIN | Indonesia Computer Society |
| IPMS | International Plastic Model Society |
| IPMS | International Plastic Modelers Society |
| IPMS | International Plastic Modeling Society |
| IPMS | International Plastic Modellers Society |
| IPPS | International Pelvic Pain Society |
| IPPS | International Plant Propagators Society |
| IPRCS | Irish Pattern Recognition and Classification Society |
| IPRMS | Immortal Performances Recorded Music Society |
| IPRS | Indian Performance Rights Society |