When I was an engineering student I took three CAD classes, mostly because they were fun. When I was the director of engineering at ATL, CAD was at the center of all our detailed design work. It was indispensable to our engineering. When I became a professor, however, my appreciation for CAD slowly and unconsciously faded. Luckily, a new university assignment has put CAD back on my radar and my appreciation for it is greater than ever.