nude

nude adj.  Said of machines delivered without an operating
   system (compare {bare metal}).  "We ordered 50 systems, but
   they all arrived nude, so we had to spend a an extra weekend with
   the installation tapes."  This usage is a recent innovation
   reflecting the fact that most PC clones are now delivered with DOS
   or Microsoft Windows pre-installed at the factory.  Other kinds of
   hardware are still normally delivered without OS, so this term is
   particular to PC support groups.