The Development of CAD Design Software
Before CAD (Computer-Aided Design) programs were invented, engineers and designers had to draw everything by hand. This process was known as manual drafting. While manual drafting worked, it had many drawbacks. It took a lot of time, mistakes were common, and it was hard to make changes. Drawings also had to be done at the actual size, which made large designs difficult to manage.
Know More: https://alcads.com/why-cad-des....ign-programs-are-ess