| Abbreviation | Definition |
|---|---|
| MVCI | Music Video Commercial Institute |
| MVICW | The Martha's Vineyard Institute of Creative Writing |
| MWCI | MacDougall Walker Correctional Institution |
| MWI | Mississippi Wraparound Institute |
| MWI | Missouri Welding Institute |
| MWI | Modern War Institute |
| MXI | Malcolm X Institute |
| MYI | Manson Youth Institution |
| NAAFI | Navy Army and Air Forces Institutes |
| NAAFI | Naval Army Air Force Institutes |
| NAAFI | Naval Army and Air Force Institute |
| NAAFI | Navy Army Air Force Institute |
| NAAFI | Navy Army Air Force Institutes |
| NAAFI | Navy Army Air Force Institution |
| NAAFI | Navy Army and Air Force Institutes |
| NACI | Neepawa Area Collegiate Institute |
| NACI | NephCure Accelerating Cures Institute |
| NACI | North Albion Collegiate Institute |
| NADI | Novartis Agricultural Discovery Institute |
| NADRA | National Database And Registration Authority |