AutoCAD is a software that replaces manual drafting with an automated process. If you are working in the architecture, MEP, or structural engineering fields, you’ve probably used 2D or 3D CAD programs. These programs mainly help you in exploring design ideas, visualize concepts through photorealistic renderings, and simulate how a design will perform in the real world. AutoCAD was the first CAD program, and it is still the most widely used CAD application.