Alfonso Romero is a freelance computer consultant and translator from Mexico. He's been working with Linux and open source software since 1999. He started operating his first web server (Apache) from a PC at home, offering free hosting services to experiment with Postfix, Squirrel Mail, MySQL, Apache, Tomcat, and Virtual Hosting. Since then, he's been working as a computer consultant for several clients in Mexico – writing Java, C++, and Web applications. Since 2000, he has worked for Pearson Education in Mexico as a computer books freelance translator and consultant. His latest book translations are the Spanish versions of Java How to Program, Seventh Edition, from Deitel & Deitel, and C++ How to Program, Sixth Edition, also from Deitel & Deitel. Al enjoys writing tutorials and teaching about Java, C++, PHP, the Apache Web server, Tomcat, MySQL, Web applications like Apache Roller, and all of the wonderful open source applications used today, and when he's not experimenting with new trends in Open Source applications, he enjoys playing his electric guitar.