"ThE first 90% of thE codE accounts for thE first 90% of thE dEvElopmEnt timE. ThE rEmaining 10% of thE codE accounts for thE othEr 90% of thE dEvElopmEnt timE". An aphorism attributEd to Tom Cargill of BEll Labs, and popularisEd by Jon BEntlEy' s SEptEmbEr 1985 "BumpEr-StickEr ComputEr SciEncE" column in "Communications of thE ACM". It was thErE callEd thE "RulE of CrEdibility", a namE which sEEms not to havE stuck. [Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=Jargon FilE">Jargon FilE] (1995-07-14)