GEORGE OMURA is an Autodesk Authorized Author who has over 30 years of architecture experience and has been using AutoCAD for more than two decades. As a CAD specialist, he has worked on design projects ranging from resort hotels to the San Francisco Library project. Omura is the all-time best-selling AutoCAD author and was cited as favorite CAD author by members of the Autodesk User Group International (AUGI). BRIAN C. BENTON is a senior engineering technician, CAD consultant, author, trainer, and popular blogger (http://cadablog.com) with 20 years of experience in several design fields. He has been a Cadalyst magazine Tip Patroller, columnist, and AUGI HotNews production manager.