| Acronym | Definition |
|---|
| IPSI | iPerceptions Satisfaction Index |
| IPSI | Institute for Integrated Publication and Information Systems (GMD, Germany) |
| IPSI | Ikatan Pencak Silat Indonesia (national governing body for the Indonesian martial art of Pencak Silat) |
| IPSI | Identity, Privacy and Security Institute (University of Toronto; Canada) |
| IPSI | Indonesian Pencak Silat Association (Jakarta, Indonesia) |
| IPSI | Integrated Power Systems International, Inc (Rochester, NY) |
| IPSI | Internet Protocol Server Interface |
| IPSI | Insurance Placement Services, Inc. (State Farm general agency) |
| IPSI | Institute for Industry Policy and Strategy (Vietnam) |
| IPSI | Ingles Portugues San Isidro (Buenos Aires, Argentina) |