| Abbreviation | Definition |
|---|---|
| MOCAI | Mount Olivet Certified Academic Institution |
| MODI | Murder Of Democratic Institutions |
| MOI | Mauritius Oceanography Institute |
| MOI | Midwest Orthopaedic Institute |
| MOI | Missouri Orthopaedic Institute |
| MPCI | Meyers Primary Care Institute |
| MPHI | Michigan Public Health Institute |
| MPI | Max Planck Institute |
| MPI | Medical Professional Institute |
| MPI | Migration Policy Institute |
| MPI | Minal Polytechnic Institute |
| MPIA | Max Planck Institute for Astronomy |
| MPII | Max Planck Institute for Informatics |
| MPIM | Max Planck Institute for Mathematics |
| MPIR | Max Planck Institute for Radio |
| MPPI | Maine Public Policy Institute |
| MPPI | Manitoba Professional Planners Institute |
| MPPI | Maryland Public Policy Institute |
| MPPI | McNair Promising Practices Institute |
| MPRI | Macau Policy Research Institute |