MBI
- MB1
- MBI (Michigan Biotechnology Institute)
- MBI Publishing Company
- Machaneh Bonim in Israel
- Management buy-in
- Maslach Burnout Inventory
- Master of Business Informatics
- Mathematical Biosciences Institute
- Mbeya Airport
- Metropolitan Bureau of Investigation
- Mild behavioral impairment
- Minnesota Brass Inc.
- Mississippi Highway Patrol
- Molecular Breast Imaging
- Moody Bible Institute
- Morgunblaðið