AutoCAD is a CAD software application for 2D and 3D design and drafting, developed by Autodesk. AutoCAD supports a number of application programming interfaces (APIs) for customization and automation. These include AutoLISP, Visual LISP, VBA, .NET and ObjectARX. ObjectARX is a C++ class library, which was also the base for products extending AutoCAD functionality to specific fields, to create products such as AutoCAD Architecture, AutoCAD Electrical, AutoCAD Civil 3D, or third-party AutoCAD-based applications. AutoCAD’s native file format, DWG, and to a lesser extent, its interchange file format, DXF, have become de facto standards for CAD data interoperability. AutoCAD in recent years has included support for DWF, a format developed and promoted by Autodesk for publishing CAD data.
AutoCAD currently runs exclusively on Microsoft desktop operating systems. AutoCAD is a high end CAD (Computer Aided Drafting) Program. It has a multitude of features which this book will try to address. AutoCAD is a vector based drawing application intended for engineering purposes. Commands can be entered at a command line or through toolbars and menus.