http://www.fordhamprep.org/gcurran/sho/sho/lessons/lesson34.htm Neat info site with periodic table and chem. Information.
http://www.edge.org/documents/archive/edge313.html Predictions and thoughts from David Gelernter who, apparently, predicted the Internet and cloud computing. Interesting reading.
http://www.google.com/publicdata/directory Sweet.
http://www.berkshirehathaway.com/letters/2009ltr.pdf Buffett’s annual letter