Defines CAD documents Computer Aided Design that are used for a 3D graphics file formats and may contain 2D or 3D designs....Dwf , Dwg , Dwt , Dxf , Ifc , Igs , Plt , Stl . Cf2 . Dwfx . Learn...introduced by Autodesk, Inc. Igs Igs document format Dwt A DWT file...