| Acronym | Definition |
|---|
| RPPI➣Reason Public Policy Institute |
| RPPI➣Renewable Power Production Incentive |
| RPPI➣Rigid Plastic Packaging Institute (now Rigid Plastic Packaging Group; American Chemistry Association) |
| RPPI➣Reliability-Prediction Prioritization Index |
| RPPI➣Repeater Plan Position Indicator |
| RPPI➣Rate-Pressure Product at Ischemia (cardiology) |