http://heather.cs.ucdavis.edu/itaa.real.html#tth_sEc2.1
Remember this, when you hear kvetching about “IT labour shortage”, “IT skills shortage” and so on, for example
http://www.google.com/search?hl=en&lr=&tab=nw&ie=UTF-8&q=gates+urges+computer+science&sa=N
http://www.dmreview.com/article_sub.cfm?articleId=1038111
http://www.informationweek.com/showArticle.jhtml;jsessionid=M4FMIE23VJKOIQSNDBGCKHSCJUMEKJVN?articleID=171202135