Source : Free On-Line Dictionary of Computing

stone knives and bearskins
     
        (From the Star Trek Classic episode "The City on the Edge of
        Forever") A term traditionally used to describe (and
        deprecate) computing environments that are grotesquely
        primitive in light of what is known about good ways to design
        things.  As in "Don't get too used to the facilities here.
        Once you leave SAIL it's stone knives and bearskins as far as
        the eye can see".
     
        Compare {steam-powered}.
     
        [{Jargon File}]
     
        (1995-01-24)