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
• Motherboard

Mb may mean:

• Myoglobin, a type of protein chain

mb may mean:

• Millibar, a unit of pressure. Sometimes written as mBar.

This disambiguation page lists articles associated with the title MB. If an internal link led you here, you may wish to change the link to point directly to the intended article.