George Omura is a licensed architect of 30 years, and an Autodesk Authorized Author. With over 20 years of experience using CAD, he has worked on a wide range of projects including resort hotels, metropolitan transit systems, and the San Francisco Library. George is the all-time bestselling AutoCAD author, and was cited as a favorite of Autodesk User Group International members in AUGIWorld magazine's "Best of Everything CAD" issue. Brian C. Benton is a senior engineering technician, CAD consultant, author, trainer, and popular blogger with 20 year of experience in several design fields. He is the Tip Patroller columnist for Cadalyst magazine, the AUGI HotNews production manager, and an annual presenter at Autodesk University.