| Abbreviation | Definition |
|---|---|
| MI | Monza Indianapolis |
| MI | Murderball, Inc. |
| MIA | Melia Inversiones Americanas, S.A. |
| MIA | Mesa International Accomodations |
| MIA | Message Express Internet |
| MIA | Miami Ice Arena |
| MIAA | Medilink International Air Ambulance |
| MIAA | Mersey Internal Audit Agency |
| MIAC | Metropolitan Insurance and Annuity Company |
| MIC | Macquarie Infrastructure Company |
| MIC | Macquarie Infrastructure Corp |
| MIC | Macquarie Infrastructure Corporation |
| MIC | Millicom International Cellular, S.A. |
| MIC | Mortgage Investors Corporation |
| MIC | Music Industry Coalition |
| MICA | Mutual Insurance Company of Arizona |
| MICI | Madden Industrial Craftsmen Inc |
| MICI | Midwest Industrial Coatings Inc |
| MICO | Motor Industries Company Ltd. |
| MiDA | Millennium Development Authority |