MPI
- Enterprise master patient index
- MPI Media Group
- Magnetic Peripherals
- Magnetic particle imaging
- Magnetic particle inspection
- Manitoba Public Insurance
- Mannose phosphate isomerase
- Marburg Picture Index
- Mariposa-Yosemite Airport
- Mass psychogenic illness
- Materials Processing Institute
- Max Planck Institute
- Maximum potential intensity
- Merchant plug-in
- Message Parsing Interpreter
- Message Passing Interface
- Migration Policy Institute
- Mihajlo Pupin Institute
- Milanka Price Index
- Ministry for Primary Industries
- Ministry of Planning and Investment
- Mission Pictures International
- MotivePower
- Movimiento Pro-Independencia
- Moving Picture Institute
- Mpi language
- Mpi people
- Multi point injection
- Multi-Point Interface
- Multidimensional Pain Inventory
- Multidimensional Poverty Index
- Multipath interference
- Multiple precision integer
- Myocardial perfusion imaging