Source : WordNet®

Winchester
     n 1: a city in southern England; administrative center of
          Hampshire
     2: a shoulder rifle

Source : Free On-Line Dictionary of Computing

winchester
     
         An informal generic term for {floating-head}
        {magnetic disk} drives in which the read-write head planes
        over the disk surface on an air cushion.
     
        The name arose because the original 1973 engineering prototype
        for what later became the {IBM 3340} featured two 30-megabyte
        volumes; 30--30 became "Winchester" when somebody noticed the
        similarity to the common term for a famous Winchester rifle
        (in the latter, the first 30 referred to caliber and the
        second to the grain weight of the charge).
     
        [{Jargon File}]
     
        (1994-12-06)