| MFPI | Membrane Filtration Products, Incorporated 
| Others |
| MFPI | Metropolitan Family Planning Institute
| Others |
| MFPI | Milwaukee Foreclosure Partnership Initiative
| Others |
| MFPI | Monarch Fire Protection Incorporated, West Chicago, Illinois
| Others |
| MFPI | Mountaineering Federation of the Philippines, Incorporated
| Others |
| MFPI | Multi Function Peripheral Interface
| Others |
| MFPI | Multi-Functional Peroxisomal Isozyme
| Others |
| MFPI | Multiple Food Protein Intolerance
| Others |