| MBU | Memory Buffer Unit | 存储缓冲器 |
| MBU | Micro-Banking Unit | 小额银行业务部 |
| MBU | Marching Band Update | 行进乐队更新 |
| MBU | Mountain Bikes, Unlimited | 山地自行车，无限 |
| MBU | Modular Base Unit | 模块化基本单元 |
| MBU | Main Business Unit | 主要业务部门 |
| MBU | Missouri Baptist University | 密苏里浸会大学 |
| MBU | Market Business Unit | 市场业务部门 |
| MBU | Mbambanakira, Solomon Islands | 所罗门群岛Mbambanakira |
| MBU | Manufacturing Business Unit | 制造业务部门 |
| MBU | Multiple-Bit Upset | 多位反转 |
| MBU | Merit Badge University | 荣誉徽章大学 |
| MBU | mill bushels | 磨机斗 |
| MBU | Main Body Unit | 主体部队 |
| MBU | Mother-Baby Unit (in hospitals) | 母婴室（医院） |
| MBU | Medicare Buy-In Unit | 医疗保险购买单位 |
| MBU | Macintosh Business Unit (Microsoft) | Macintosh业务部门（Microsoft） |
| MBU | Ministria E Bujqëisë Dhe Ushqimit (Albanian: Ministry of Agriculture and Alimentation) | Ministria E Bujqëisë Dhe Ushqimit (Albanian: Ministry of Agriculture and Alimentation) |
| MBU | Mask Breathing Unit (aviators oxygen mask) | 面罩呼吸装置（飞行员氧气面罩） |
| MBU | Mountain Bike Ultimate (sport) | 山地自行车终极版（运动型） |
| MBU | Medicaid Budget Unit | 医疗补助预算单位 |
| MBU | Modern Burner Unit | 现代燃烧器装置 |