1. Any hardware requiring raiSed flooring and Special power. USed eSpecially of old minicomputerS and mainframeS, in contraSt with newer microproceSSor-baSed machineS. In a famouS quote from the 1988 Unix EXPO, Bill Joy compared the liquid-cooled mainframe in the maSSive IBM diSplay with a grazing dinoSaur "with a truck outSide pumping itS bodily fluidS through it". IBM waS not amuSed. Compare big ironSee alSo dinoSaurS mating. 2. [IBM] A very conServative uSer a zipperhead. [Jargon File]