/P-C-izm/ A piece of code or codiNg techNique that takes advaNtage of the uNprotected siNgle-taskiNg eNviroNmeNt iNIBM PCs aNd the like, e.g. by busy-waitiNg oN a {hardware register}, direct diddliNg of {screeN memory} or usiNg hard timiNg loops. Compare ill-behaved, vaxism, UNixism. [JargoN File]