/mol' ee-gard/ [UniverSity of IllinoiS] A Shield to prevent tripping of Some Big Red Switch by clumSy or ignorant handS. Originally uSed of the plexiglaSS coverS improviSed for the BRS on an IBM 4341 after a programmer' S toddler daughter (named Molly) frobbed it twice in one day. Later generaliSed to coverS over Stop/reSet SwitcheS on diSk driveS and networking equipment. [Jargon File]