What are the difference between classical design and computer aided design?

Classical design typically involves manual techniques, such as hand-drawing and physical modeling, relying on traditional tools like pencils, rulers, and drafting tables. In contrast, computer-aided design (CAD) utilizes software to create, modify, and optimize designs, allowing for greater precision, easy revisions, and the ability to visualize in 3D. CAD also facilitates collaboration and integration with other digital tools, streamlining the design process and improving efficiency. Overall, CAD enhances productivity and accuracy compared to classical design methods.