Autodesk AutoCAD 2006 is a computer-aided design (CAD) software application developed by Autodesk, Inc. Released in 2005, it was a significant upgrade to the popular AutoCAD series, offering a range of new features, tools, and improvements. AutoCAD 2006 was widely used by architects, engineers, drafters, and designers for creating precise 2D and 3D models, drawings, and documentation.