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Sean Walton, MSCS, author of Linux Socket Programming (Sams Publishing, 2001, ISBN 0-672-31935-7), has served in several senior technical and leadership roles for networking and Internet connectivity, including virtual teaming and collaboration, wireless technology and publishing, and web single sign-on and portals. He is also a certified trainer and process design expert in UML, C++, OOA/D, and Java. Earlier in his career, he developed and patented a firmware process using heuristic algorithms for automatic printer-language selection found on Hewlett-Packard LaserJet printers. Sean also created a real-time operating system on the 8052 microcontroller for HP printer engine emulation.