David Byrnes is one of those grizzled old-timers you'll find mentioned every so often in AutoCAD 2009 For Dummies. He began his drafting career on the boards in 1979 and discovered computer-assisted doodling (you always wondered what CAD stood for, didn't you?) shortly thereafter. He first learned AutoCAD with version 1.4, around the time when personal computers switched from steam to diesel power. Dave is based in Vancouver, British Columbia, and has been an AutoCAD consultant and trainer since 1988, since which he has been a contributing author to ten books on AutoCAD. He teaches AutoCAD and other computer graphics applications at Emily Carr Institute of Art + Design and British Columbia Institute of Technology in Vancouver. Dave has been with the AutoCAD For Dummies series for longer than he cares to remember. He was technical editor for four AutoCAD For Dummies and two AutoCAD LT For Dummies titles and then coauthor of two more AutoCAD For Dummies editions. AutoCAD 2009 For Dummies is his second outing as a solo act.