Patriot Missile Software Bug (Range Gate Calculation)
there is some scientific/ engineering analysis of this defect &amp; its background by professionals eg this turned up by the SEERI institute, Software Engr Ethics Research institute, An analysis of the patriot missile system (note, some glitch with figure(s) at time of this writing). essentially the missile tracking logic is highly time dependent and relies on the clock being accurate to predict the missile location and intercept position and steering corrections. there are many other "classic" bugs in software that are related to clock logic. analysis of the failure also includes/ points to inadequate testing.

another reference cited in that article, Roundoff error and the patriot missile / Robert Skeel, SIAM News.

this particular defect is getting some attention lately as it was recently ranked in the 5 most infamous software bugs of all time and of course its related to missile defense technology, a hot topic during wars.