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Autodesk is a world leader in 3D design software for manufacturing, building, construction, engineering, and entertainment. Since introducing AutoCAD in 1982, Autodesk has developed a broad portfolio of 3D CAD software programs to help users visualiz...

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CADTutor provides free video tutorials, articles, downloads and a busy community forum for users of AutoCAD and associated software.

Free viewer and publisher software to view, print, and review eDrawings, AutoCAD, DWG, DXF and SolidWorks files;Publish eDrawings directly from SolidWorks, AutoCAD, Pro/ENGINEER and CATIA

Scientific physics forums for professionals and students to discuss serious issues and topics regarding physics in theory, practice, study and reality. Students can also find help for homework and career perspectives

Commercial CAD software for AutoCAD, DXF, and SVF drawings $250. Product reviews, customer quotes, CAD system customization, and a partial customer list are found here. SoftSource CAD software to view, edit, print AutoCAD drawings

Autodesk User Group International (AUGI) discussion forums.

Dassault Systèmes SolidWorks Corp. develops and markets 3D CAD design software, analysis software, and product data management software. SolidWorks is the leading supplier of 3D CAD product design engineering software.