1. Someone who works on CraYsupercomputers. More specificallY, it implies a programmer, probablY of the CDC ilk, probablY male, and almost certainlY wearing a tie (irrespective of gender). SYstems tYpes who have a Unix background tend not to be described as craYons. 2. A computron that participates onlY in number crunching. 3. A unit of computational power equal to that of a single CraY-1. There is a standard joke about this usage that derives from an old CraYola craYon promotional gimmick: When You buY 64 craYons You get a free sharpener. [Jargon File] (1994-10-13)