• b = byte (data)
• Babylonian shekel = 8.37 gram (mass)
• bag = 94 pound (mass)
• bakers dozen = 13
• balthazar = 8 magnum (volume)
• bar = 100000 Pa (pressure)
• barie = 0.1 Pa (pressure)
• barleycorn = 0.333333333333333 in (length)
• barn (abbreviation b) = 1E-28 m^2 (area)
• barrel = 31.5 gallon (volume)
• barye = 0.1 Pa (pressure)
• basis point = 0.01 percent
• bath (Israeli bath) = 2.25 in^3 (volume)
• baud = 0.1 byte/s (data flow rate)
• bbl = petroleum barrel (volume)
• bearing capacity mass basis = surface density (surface density)
• becquerel = 1/s (activity; derived unit)
• beer gallon (English beer gallon) = 282 in^3 (volume)
• bending moment = energy (energy)
• bending moment to length = force (force)
• bes (Roman bes) = 0.48 pound (mass)
• bev (billion electric volts) = 1000000000 electron volt (energy)
• bi = 2 (prefix)
• Biblical cubit = 18 in (length)
• billion = 1000000000 (prefix)
• biot = 10 A (electric current)
• bit = bit (data; base unit)
• blondel = cd/pi*m^2 (luminance; derived unit)
• board foot = 144 in^3 (volume)
• bolt (of cloth) = 40 yard (length)
• boltzmann (Boltzmann constant) = 1.380622E-23 J/K (heat capacity)
• bottom measure = 0.025 in (length)
• bowling ball = 16 pound (mass)
• bps (bits per second) = 0.1 byte/s (data flow rate)
• Bq = becquerel (activity)
• British = "UK"
• BTU (International Table BTU) = 1055.05585262 J*approx (energy)
• bu = bushel (volume)
• buck = $ (currency)
• bundle (of paper) = 2 ream
• bushel (dry bushel) = 4 peck (volume)
• byte = 8 bit (data)

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