| Acronym | Definition |
|---|
| MBU | Multiple Bit Upset |
| MBU | Memory Back up |
| MBU | Memory Buffer Unit |
| MBU | Missouri Baptist University |
| MBU | Million Bushel (measurement) |
| MBU | Macintosh Business Unit (Microsoft) |
| MBU | Merit Badge University |
| MBU | Marble Blast Ultra (video game) |
| MBU | Mother-Baby Unit (in hospitals) |
| MBU | Modern Burner Unit |
| MBU | Multiple-Bit Upset |
| MBU | Media Buying Unit |
| MBU | Manufacturing Business Unit |
| MBU | Mountain Bike Ultimate (sport) |
| MBU | Market Business Unit |
| MBU | Mask Breathing Unit (aviators oxygen mask) |
| MBU | Mobile Broadcasting Unit |
| MBU | Main Body Unit |
| MBU | Main Business Unit |
| MBU | Modular Base Unit |
| MBU | Ministria E Bujqëisë Dhe Ushqimit (Albanian: Ministry of Agriculture and Alimentation) |
| MBU | Mini Business Unit (various organizations) |
| MBU | Mind and Body Unity |
| MBU | Medicaid Budget Unit |
| MBU | Micro-Banking Unit |
| MBU | Medicare Buy-In Unit |