pc-ism

from The Free On-line Dictionary of Computing (8 July 2008)

PC-ism

   /P-C-izm/ A piece of code or coding technique that takes
   advantage of the unprotected single-tasking environment in
   {IBM PCs} and the like, e.g. by {busy-wait}ing on a {hardware
   register}, direct diddling of {screen memory} or using hard
   timing loops.  Compare {ill-behaved}, {vaxism}, {Unixism}.

   [{Jargon File}]