Source : Webster's Revised Unabridged Dictionary (1913)

Boxen \Box"en\ (b[o^]ks"'n), a.
   Made of boxwood; pertaining to, or resembling, the box
   ({Buxus}). [R.]

         The faded hue of sapless boxen leaves.   --Dryden.

Source : Free On-Line Dictionary of Computing

boxen
     
        /bok'sn/ (By analogy with {VAXen}) A fanciful plural of {box}
        often encountered in the phrase "Unix boxen", used to describe
        commodity {Unix} hardware.  The connotation is that any two
        Unix boxen are interchangeable.
     
        [{Jargon File}]
     
        (1994-11-29)