This document provides an overview of computer-aided design (CAD) software programs for 2D drawing and 3D modeling. It lists AutoCAD as a popular 2D drawing program that uses vector-based geometric entities like points, lines, arcs, and parametric and non-parametric polygons. The document also mentions several 3D modeling programs, including Inventor, SolidWorks, Pro/Engineer, and CATIA that allow for 3D vector modeling of parts and assemblies.