Winchester
: n. 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).
