On Thu, 27 Jul 2006, Patrick Finnegan wrote:
  IBM has been rating hard drives in millions (or
thousands perhaps) of
 characters since they started making them.  "MB" meaning "Million
 bytes" for magnetic storage media is hardly a new thing, from what I
 can determine.
 Not that they've been consistent either... "360kB" through
"1.44MB"
 floppies, for instance. 
IBM does not use 2**20, NOR 10**6 for meg of disk space!
For a meg of memory, they use 1048576, Mebi, 2**20, but
for a meg of disk space, they use 1024000, 1000Kibi, 2**10 * 10**3