chicken head

chicken head n.  [Commodore] The Commodore Business
   Machines logo, which strongly resembles a poultry part.  Rendered
   in ASCII as `C='.  With the arguable exception of the Amiga (see
   {amoeba}), Commodore's machines are notoriously crocky little
   {bitty box}es (see also {PETSCII}).  Thus, this usage may owe
   something to Philip K. Dick's novel "Do Androids Dream of
   Electric Sheep?"  (the basis for the movie "Blade Runner"; the
   novel is now sold under that title), in which a `chickenhead' is
   a mutant with below-average intelligence.