vi AutoCAD and Its Applications—Advanced Copyright Goodheart-Willcox Co., Inc. About the Authors About the Authors Terence M. Shumaker is Faculty Emeritus, the former Chairperson of the Drafting Technology Department, and former Director of the Autodesk Premier Training Center at Clackamas Community College in Oregon City, Oregon. Terence taught at the community college level for over 28 years. He worked as a training consultant for Autodesk, Inc., and conducted CAD program development workshops around the country. He has professional experience in surveying, civil drafting, industrial piping, and technical illustration. He is the author of Goodheart-Willcox’s Process Pipe Drafting and coauthor of the AutoCAD and Its Applications series. David A. Madsen is the president of Madsen Designs Inc. (www.madsendesigns.com). David is Faculty Emeritus and the former Chairperson of Drafting Technology and the Autodesk Premier Training Center at Clackamas Community College in Oregon City, Oregon. David was an instructor and a department chairperson at Clackamas Community College for nearly 30 years. In addition to teaching at the community college level, David was a Drafting Technology instructor at Centennial High School in Gresham, Oregon. David is a former member of the American Design Drafting Association (ADDA) Board of Directors. He was honored with Director Emeritus status by the ADDA in 2005. David has extensive experience in mechanical drafting, architectural design and drafting, and building construction. He holds a Master of Education degree in Vocational Administration and a Bachelor of Science degree in Industrial Education. David is coauthor of the AutoCAD and Its Applications series, Architectural Drafting Using AutoCAD, Geometric Dimensioning and Tolerancing, and other drafting and design textbooks. Jeffrey A. Laurich has been an instructor in Mechanical Design Technology at Fox Valley Technical College in Appleton, Wisconsin, since 1991. He has also taught busi- ness and industry professionals in the Autodesk Premier Training Center at FVTC. Jeff teaches drafting, AutoCAD, Design of Tooling, GD&T, and 3ds Max. He created a certifi cate program at FVTC titled Computer Rendering and Animation that inte- grates the 3D capabilities of AutoCAD and 3ds Max. Jeff has professional experience in furniture design, surveying, and cartography. He holds a diploma in Mechanical Drafting, an Associate of Applied Science degree in Natural Resources Technology, and a Bachelor of Science degree in Career and Technical Education and Training. Together with other instructors at FVTC, Jeff has created courses in electric guitar building and technical illustration. J.C. Malitzke is president of Digital JC CAD Services Inc. (digitaljccad.com), a training and consulting company using Autodesk products. He is the former department chair of Computer Integrated Technologies at Moraine Valley Community College in Palos Hills, Illinois. J.C. was a professor of Mechanical Design and Drafting/CAD and taught for the Autodesk Authorized Training Center at Moraine Valley. J.C. has been actively using and teaching Autodesk products for more than 30 years. He is a founding member and past chair of the Autodesk Training Center Executive Committee and the Autodesk Training Center Leadership Council. J.C. has been the coauthor and principal investigator on two National Science Foundation grants. He has won numerous awards, including: Drafting Educator of the Year by the Illinois Drafting Educators Association the Instructor Quality Award by Autodesk Autodesk University Instructor Award Professor of the Year, Co-Innovator of the Year, and Co-Master Teacher awards at Moraine Valley Community College and the Illinois Outstanding Faculty Member of the Year awarded by the Illinois Community College Trustees Association. J.C. was also one of the recipi- ents of the Top 10 Most Popular Autodesk University Classes Ever award for his class Compelling 3D Features in AutoCAD. J.C. is an Autodesk Certifi ed Instructor (ACI) and an Autodesk Certifi cation Evaluator (ACE), and holds a Bachelor’s degree in Education and a Master’s degree in Industrial Technology from Illinois State University.