THE PURPOSE OF THE RESEARCH CONDUCTED BY THE RESEARCHER IS TO DEVELOP A TEXTBOOK FOR THE TECHNICAL DRAWING COURSE IN THE MECHANICAL ENGINEERING EDUCATION STUDY PROGRAM. THE METHOD USED IN THIS RESEARCH IS THE RESEARCH AND DEVELOPMENT (R&D) METHOD EMPLOYING THE 4D INSTRUCTIONAL BOOK DEVELOPMENT MODEL. (DEFINE, DESIGN, DEVELOP, DAN DISSEMINATE). THIS ELECTRONIC TEXTBOOK IS DESIGNED TO ENHANCE STU…