Brian C. Benton is a CAD manager, civil designer, CAD service provider, technical writer, and blogger. He has more than 27 years of experience in various design fields (mechanical, structural, civil, survey, marine, environmental) and is well versed in many design software packages (CAD, GIS, and graphics). He has been Cadalyst magazine's Tip Patroller, AUGI HotNews production manager, and Infinite Skills' AutoCAD training video author. George Omura is a licensed architect and Autodesk Authorized Author with more than 30 years' experience in architecture. He has used AutoCAD for over two decades and worked on design projects ranging from resort hotels to metropolitan transit systems and the San Francisco Library project. He is the all-time best-selling AutoCAD author and is a graduate of the University of California at Berkeley.