A prolific author and respected instructor, Mr. Alan Jefferis, has taught drafting technology at Clackamas Community College, an Authorized AutoCAD Training Center, for more than thirty-one years. Prior to that, Mr. Jefferis taught for four years at Mt. Hood Community College in Gresham, Oregon. He brings a wealth of professional experience to his writing, including eight years of drafting for structural engineers and thirty years of residential designing. Mr. Jefferis currently owns Residential Designs. He is a former Autodesk Developer Network member and a former member of the A.I.B.D. Mr. Jefferis obtained his BS degree from San Diego State University in 1972. He has authored or co-authored numerous textbooks on architectural drafting and design and effectively working with AutoCAD.