The prefix mega means one million; this prefix means one billion
mikros  small), , 10-6, Millionth/Millionth ... are 
based on power of 2, this led to following meaning of prefixes in computer 
science:... [DOC] [TLE] Metric Numbers - Math is Fun [PAR] Example: A long rope measures one thousand meters ... "kilo", "mega", "milli" etc 
are called "prefixes": Prefix: a word ... millionth, 0.000 001, micro, .