[W/K] :: terabyte

  terabyte
       n : a unit of information equal to a trillion
           (1,099,511,627,776) bytes or 1024 gigabytes [syn: T, TB]

  terabyte
       
           2^40 = 1,099,511,627,776 bytes = 1024 gigabytes or
          roughly 10^12 bytes.
       
          (Note the spelling - one 'r').  See prefix.
       
          (1995-09-29)