by Terence M. Shumaker Faculty Emeritus Former Chairperson Drafting Technology Autodesk Premier Training Center Clackamas Community College Oregon City, OR David A. Madsen President Madsen Designs Inc. Faculty Emeritus Former Department Chairperson Drafting Technology Autodesk Premier Training Center Clackamas Community College Oregon City, OR Director Emeritus American Design Drafting Association David P. Madsen President Engineering Drafting & Design, Inc. Vice President Madsen Designs Inc. Computer-Aided Design and Drafting Consultant and Educator Autodesk Developer Network Member American Design Drafting Association Member Publisher The Goodheart-Willcox Company, Inc. Tinley Park, IL www.g-w.com AutoCAD® and Its Applications BASICS 2020