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AutoCAD
From Wikipedia, the free encyclopedia
AutoCAD is a CAD 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 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. In 2006, Autodesk estimated the number of active DWG files to be in excess of one billion. In the past, Autodesk has estimated the total number of DWG files in existence to be more than three billion.


Version history
• Version 1.0 (Release 1) - December 1982
• Version 1.2 (Release 2) - April 1983
• Version 1.3 (Release 3) - August 1983
• Version 1.4 (Release 4) - October 1983
• Version 2.0 (Release 5) - October 1984
• Version 2.1 (Release 6) - May 1985
• Version 2.5 (Release 7) - June 1986
• Version 2.6 (Release 8) - April 1987
• Release 9 - September 1987
• Release 10 - October 1988
• Release 11 - October 1990
• Release 12 - June 1992 (last release for Apple Macintosh)
• Release 13 - November 1994 (last release for Unix, MS-DOS and Windows 3.11)
• Release 14 - February 1997
• AutoCAD 2000 (R15.0) - March 1999
• AutoCAD 2000i (R15.1)- July 2000
• AutoCAD 2002 (R15.6) - June 2001
• AutoCAD 2004 (R16.0) - March 2003
• AutoCAD 2005 (R16.1) - March 2004
• AutoCAD 2006 (R16.2) - March 2005
• AutoCAD 2007 (R17.0) - March 2006
• AutoCAD 2008 (R17.1) - March 2007
• AutoCAD 2009 (R17.2) - March 2008