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MB may refer to:

Businesses and organisations[edit]



  • MapBasic Source Code
  • MaBiao (码表), the code table of IMEGen Applet designed by Microsoft and Zhong Yi (中易), distributed with Windows
  • Mathematica Binary, a software before Mathematica 4.0
  • Maya Binary, the 3D file format for Maya (software)





  • Millibar, a unit of pressure frequently used in meteorology equal to one thousandth of a bar
  • Millions of barrels (Mb, Mbbl or MMbbl), one million barrels of oil
  • Megabase, a unit of measurement in genetics
  • Body wave magnitude (mb), a type of seismic scale
  • Millibarn, a unit of area used in nuclear physics and particle physics
  • Millibit, a (rare) unit of information equal to one thousandth of a bit
  • mb, a rarely used unit of Imperial weight equal to 1000 lbs or roughly 453 Kilograms
  • Millibel, a hundredth of a decibel