Mb

mb, Mb, and MB may stand for:

• Manitoba
• Mercedes Benz
• a manned base
• Bachelor of Medicine (academic degree)
• Medical Board
• megabit (Mb)¹, or 1,048,576 (2²⁰) bits, or 1,000,000 bits
• megabyte (MB)¹, or 1,048,576 (2²⁰) bytes, or 1,000,000 bytes
• millibar (mb)¹, a unit of pressure equal to one hectopascal

¹ Although this is correct usage, capitalisation is often incorrect or completely ignored in many documents, so that the context is more of a clue to what each means.