Mb may refer to any of the following:
With a capital B, MB is an abbreviation for megabyte. See our megabyte overview page for further information.
With a lowercase b, Mb is an abbreviation for megabit. See our megabit overview page for further information.
MB or mb is also a common abbreviation for motherboard. See our motherboard overview for additional information.
BIT, Byte, Mbps, Measurements, Mega-, Mib