| Acronym | Definition |
|---|
| IPIS➣International Peace Information Service (Antwerp, Belgium) |
| IPIS➣Institute for Political and International Studies (est. 1983; Tehran, Iran) |
| IPIS➣Instrument Pilot Instructor School |
| IPIS➣Intellectual Property Insurance Services (Louisville, KY) |
| IPIS➣Interactive Parameter Identification System (NASA) |
| IPIS➣Incomplete Pulmonary Infarction Syndrome (heart and lungs) |