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JM is a Spanish System Developer, spending his time writing mobile phones games with J2ME.
He also wrote data-mining aplications with Win32, Visual C++, C++Builder, XML and others.
You can see his personal website (spanish) at
http://www.lawebdejm.com where he talk about Win32 internals, C/C++, Delphi, eXtreme Programming, UML and others technologies.