MB, Mb, mB or mb may mean:
- Megabit (1,000,000 bits), preferred symbols Mb
- Megabyte (1,000,000 bytes), preferred symbol MB
- Mebibyte (220 = 1,048,576 bytes), preferred symbol MiB
MB may mean:
- Bachelor of Medicine, an academic degree (Latin Medicinae Baccleureus)
- MacBook, an Apple Computer
- Manitoba (Canadian Province/Territory Code)
- Maribor, a city in Slovenia
- Martinique: FIPS PUB 10-4 territory code
- Medal of Bravery (Canadian decoration post-nominal letters)
- Mercedes-Benz, a German brand of automobiles, buses, coaches and trucks
Mb may mean:
- Myoglobin, a type of protein chain
mb may mean:
- Millibar, a unit of pressure. Sometimes written as mBar.
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