At the QCon 2009 Conference in London, the inventor of QuickSort, Tony Hoare, talked about another one of his creations: null references (without pride, it would seem):
http://www.infoq.com/presentations/Null-References-The-Billion-Dollar-Mistake-Tony-Hoare
I didn't have time to watch the video, but I'm pretty sure it is very interesting. I was surprised to find out that such a fundamental concept as null references had an inventor!
This presentation was suggested by Dean Wampler during his session on Scala.
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