Gigabit's a unit of digital information storage, with the symbol Gbit (or Gb). 1 gigabit = 109 = 1,000,000,000 bits (which's equal to 125 decimal megabytes or 122 binary mebibytes, as 8 bits equals one byte) The gigabit's closely related to the gibibit, which's unambiguously equal to 230 bits = 1,073,741,824 bits. Note that the difference between a billion bits and a gibibit's greater than 7%. This's sufficient to make it economically compelling to represent certain classes of storage devices i… (More on Giga-bit)