Alan Simpson is the author of more than 80 computer books published throughout the world in more than a dozen languages. His award-winning titles have sold hundreds of thousands of copies and are best known for their light, engaging style and clear, straightforward approach to technical subjects. Alan has written books on operating sys-tems (DOS, Windows, Linux), Internet (HTML, JavaScript), databases, spreadsheets, word processing programs, and more. Prior to becoming an author, Alan worked as a software consultant, programmer, and teacher.