http://safaribooksonline.com/Corporate/Index/
http://www.redbooks.ibm.com/
http://www.freecomputerbooks.com/
http://www.onlinecomputerbooks.com/
http://www.mcsedirectory.com/books.shtml
http://www.freetechbooks.com/
http://www.techbooksforfree.com/
http://www.gayanb.com/
http://www.freebookcentre.net/
http://books.google.com/
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