information technology

http://podgoretsky.com/ftp/Docs/

This site has a whole lot of free free computer books and downloadable ebooks,
covering Windows, Unix, Java, .Net (dotNet), ASP, Visual Basic .Net, Visual
Basic, Assembly, C, C++, C# (CSharp), Cobol, DataBases, SQL, Delphi, Fortran,
Hardware, Graphics, Internet, Microsoft technologies, PHP, Perl, Unix, VBScript,
Windows 2003m and XML.

http://www.comms.scitech.susx.ac.uk/fft/

Free Ebooks in Several Technical Areas - Food For Thought - This site offers over 150 free technical ebooks hosted by the
School of Engineering and Information Technology at the University of Sussex.
Most of these are in pdf format. The categories covered are: Computer
Programming, VHDL, Operating Systems, Cryptography, Security, Networking,
Computer Clusters, Bluetooth, Mathematics, Engineering, Unix, and
Usenix.

http://www.andamooka.org/reader.pl

hosts 28 free computer and programming books covering C++, Java, Python, and Fortran Programming, Linux, CVS, Gnome, KDE, RPM, Squid, Electric Circuits, and Physics.