ClearCase ClearCase Rational Clear Case Rational Clear Case IBM Rational ClearCase IBM Rational ClearCase Clear case Atria Software in 1992 IBM Rational ClearCase IBM Rational ClearCase IBM Rational ClearCase IBM Rational ClearCase IBM Rational ClearCase wiki IBM Rational ClearCase ClearCase IBM Rational ClearCase IBM Rational ClearCase IBM Rational ClearCase IBM Rational ClearCase Rational Clear Case Wikipedia.org IBM Rational ClearCase IBM Rational ClearCase IBM Rational ClearCase ClearCase IBM Rational ClearCase IBM Rational ClearCase IBM Rational ClearCase ClearCase Rational Clearcase IBM Rational ClearCase ClearCase IBM Rational ClearCase IBM Rational ClearCase IBM Rational ClearCase