"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. [Jargon File] (1995-07-14)