Greg Harvey has authored tons of computer books, the most recent being Excel 2007 For Dummies, Windows Vista For Dummies Quick Reference, and Excel Workbook For Dummies. He started out training business users on how to use IBM personal computers and their attendant computer software in the rough-and-tumble days of DOS, WordStar, and Lotus 1-2-3 in the mid-80s of the last century. After working for a number of independent training firms, he went on to teaching semester-long courses in spreadsheet and database management software at Golden Gate University in San Francisco. His love of teaching has translated into an equal love of writing. For Dummies books are, of course, his all-time favorites to write because they enable him to write to his favorite audience, the beginner. They also enable him to use humor (a key element to success in the training room) and, most delightful of all, to express an opinion or two about the subject matter at hand.