Computer-Aided Design (CAD) refers to the use of computer systems to assist in the creation, modification, analysis, or optimization of a design. CAD software enhances the productivity of the designer, improves the quality of design, and fosters communication through documentation. It is extensively used in various fields such as engineering, architecture, and product design. CAD systems enable users to create precise drawings and technical illustrations, offering tools for 2D drawing and 3D modeling. These systems can simulate real-world conditions, allowing for thorough testing and validation before manufacturing. Popular CAD software includes AutoCAD, SolidWorks, and CATIA. By integrating CAD with other technologies like Computer-Aided Manufacturing (CAM) and Computer-Aided Engineering (CAE), industries achieve streamlined workflows, reducing time and costs. CAD has revolutionized the design process, making it faster, more efficient, and more accurate. This book provides significant information of this discipline to help develop a good understanding of Computer-Aided Design and related fields. This book elucidates new techniques and their applications in a multidisciplinary manner. Those with an interest in the field of designing or 3-D modeling would find this book helpful.