a small but good collection of stuffz,
http://secinf.net/
http://iis1.cps.unizar.es/Oreilly/
http://hk8.org/old%5Fweb/
TEXTFILES.COM
http://www.redneckrepairs.org/soft/bookz/
http://www.comms.engg.susx.ac.uk/fft/
http://preterhuman.net/texts/
http://safariexamples.informit.com/
http://www.guxiang.com/epubcn/readings/diannaotushu/500/download/1107/ms_computer_dict_5th.zip
ftp://utopia.hacktic.nl/pub/security/ [ftp://utopia.hacktic.nl ]
http://filth.orcon.net.nz/Prentice.IP.In.Wireless.Networks.eBook-LiB/l-piiwn1.zip
http://filth.orcon.net.nz/Prentice.IP.In.Wireless.Networks.eBook-LiB/l-piiwn2.zip
http://rahmat.zikri.com/books.html
http://freebooks.by.ru/
http://www.mindview.net/Books/DownloadSites
http://www.maththinking.com/boat/computerbooks.html
http://docs.rinet.ru:8080/
http://www.ebone.at/files.php?show=Books
http://www.empowermentzone.com/#unix
http://skaiste.elekta.lt/Books/
http://content.443.ch/pub/
http://www.ods.com.ua/index.phtml
http://kavosh.irost.net/books/library.htm
http://stommel.tamu.edu/~baum/programming.html
http://digital.library.upenn.edu/books/
ftp://anonymous:wsftp80@194.85.35.67:21/BOOKS/
http://www.eicage.com/Book/Linux/l1.zip ---understanding linux kernel
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http://www.nepsecure.tk
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http://www.geocities.com/visitbipin