Harold Davis is the author of numerous books about topics ranging from art and photography to programming languages and Web development. He is a well-known software engineer and technology strategist and served as a technology consultant to many of the most important high-technology companies, including Internet startups, Web infrastructure players, and Fortune 1000 technology companies. He has been a Principal Consultant at Informix Software, a Technical Director at Vignette Corporation, and the Vice President of Strategic Development at YellowGiant Corporation where he helped implement wireless directory services. He has installed a Wi-Fi network in his home, and is a member of the IEEE. Richard Mansfield has written hundreds of magazine articles on computer topics, and 31 books. His books have been translated into 11 languages, and have sold over 500,000 copies worldwide. He is a big fan of Wi-Fi and has installed several Wi-Fi systems.