AutoCAD is a CAD (Computer Aided Design) software application for 2D and 3D design and drafting, developed and sold by Autodesk, Inc. Initially released in late 1982, AutoCAD was one of the first CAD programs to run on personal computers, and notably the IBM PC. Most CAD software at the time ran on graphics terminals connected to mainframe computers or mini-computers. In earlier releases, AutoCAD used primitive entities — such as lines, polylines, circles, arcs, and text — as the foundation for more complex objects. Since the mid-1990s, AutoCAD has supported custom objects through its C++ API.

Modern AutoCAD includes a full set of basic solid modeling and 3D tools, but lacks some of the more advanced capabilities of solid modeling applications. AutoCAD is a popular program because it can be customized to suit an individual's needs. Although there are alternative CAD packages, AutoCAD is by far the most widely used system. AutoDesk’s AutoCAD is the industry leader in CAD packages. Used by Civil Engineers, Architects, Mechanical and Electrical Engineers, Aeronautical Engineers plus many other disciplines. There have been several versions of AutoCAD over the years, with each new version introducing new and more powerful features than its predecessor. Accurate, scale drawings can be created and published using AutoCAD’s powerful features. 3D 'models' can also be created giving the designer absolute control over the design from start to finish. The computerized model can be viewed through a 360º angle, and even 'rendered' with a texture on screen to give an idea of the finished product.