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.%%%%%%
From: 
http://foldoc.doc.ic.ac.uk/foldoc/foldoc.cgi?query=dinosaur
lib/main.php:944: Notice: PageInfo: Cannot find action page