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2. AutoCAD version history - Wikipedia

   en.wikipedia.org/wiki/AutoCAD_version_history

   AutoCAD version history. AutoCAD is a commercial computer-aided design (CAD) and drafting software application by Autodesk. The first release of the software started with version 1.0 in December 1982. [ 1] The software has been continuously updated since its initial release. AutoCAD opens documents with DWG compatibility as a "DWG file format ...

3. AutoCAD - Wikipedia

   en.wikipedia.org/wiki/AutoCAD

   A man using AutoCAD 2.6 to digitize a drawing of a school building. AutoCAD was derived from a program that began in 1977, and then released in 1979 [5] called Interact CAD, [6] [7] [8] also referred to in early Autodesk documents as MicroCAD, which was written prior to Autodesk's (then Marinchip Software Partners) formation by Autodesk cofounder Michael Riddle.

4. LibreCAD - Wikipedia

   en.wikipedia.org/wiki/LibreCAD

   LibreCAD. LibreCAD is a computer-aided design (CAD) application for 2D design. It is free and open-source, and available for Unix / Linux, macOS, and Windows operating systems. [ 2][ 3] Most of the interface and handle concepts are analogous to AutoCAD, making it easier to use for users with experience in this type of commercial CAD application.

5. STL (file format) - Wikipedia

   en.wikipedia.org/wiki/STL_(file_format)

   Developed by. 3D Systems. Initial release. 1987. Type of format. Stereolithography. STL is a file format native to the stereolithography CAD software created by 3D Systems. [ 3][ 4][ 5] Chuck Hull, the inventor of stereolithography and 3D Systems’ founder, reports that the file extension is an abbreviation for stereolithography. [ 6]

6. .dwg - Wikipedia

   en.wikipedia.org/wiki/.dwg

   DWG (from drawing) is a proprietary [ 3] binary file format used for storing two- and three- dimensional design data and metadata. It is the native format for several CAD packages including DraftSight, AutoCAD, ZWCAD, IntelliCAD (and its variants), Caddie and Open Design Alliance compliant applications.

7. History of CAD software - Wikipedia

   en.wikipedia.org/wiki/History_of_CAD_software

   3D rendering of spoons in CAD software. In 1981, the key products were the solid modeling packages—Romulus (ShapeData) and Uni-Solid (Unigraphics) based on PADL-2—and the surface modeler CATIA (Dassault Systemes). Autodesk was founded in 1982 by John Walker, which led to the two-dimensional system AutoCAD. [22]