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AutoCAD is a 2D and 3D computer-aided design (CAD) software application developed by Autodesk. [1] It was first released in December 1982 for the CP/M and IBM PC platforms as a desktop app running on microcomputers with internal graphics controllers . [ 2 ]
DXF was introduced in December 1982 as part of AutoCAD 1.0, and was intended to provide an exact representation of the data in the AutoCAD native file format, DWG (Drawing). For many years, Autodesk did not publish specifications, making correct creation of DXF files difficult. Autodesk now publishes the incomplete [3] DXF specifications online.
Multiple choice questions lend themselves to the development of objective assessment items, but without author training, questions can be subjective in nature. Because this style of test does not require a teacher to interpret answers, test-takers are graded purely on their selections, creating a lower likelihood of teacher bias in the results. [8]
A 2D CAD drawing A 3D CAD model. Computer-aided design (CAD) is the use of computers (or workstations) to aid in the creation, modification, analysis, or optimization of a design.
PDF is an internationally recognized open file format developed by Adobe Systems to allow electronic exchange of any printable document, independent of the source application software, hardware and operating system. PDF/E is a subset of v1.6 of the PDF specification specifically designed for engineering use.
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.. 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.
Various scales may be used for different drawings in a set. For example, a floor plan may be drawn at 1:50 (1:48 or 1 ⁄ 4 ″ = 1′ 0″) whereas a detailed view may be drawn at 1:25 (1:24 or 1 ⁄ 2 ″ = 1′ 0″). Site plans are often drawn at 1:200 or 1:100. Scale is a nuanced subject in the use of engineering drawings.
1 1 Mustang September 20, 1999 2 2 Thunderbird March 1, 2000 3 3 Camaro August 1, 2000 4 4 Corvette December 1, 2000 5 5 Durango September 17, 2001 5.3 5.3 Prowler January 30, 2002 6 6 Viper October 15, 2002 7 7 Wrangler April 18, 2003 New DWG Support for AutoCAD 2004, Autodesk Express Viewer Compatibility, Large-Assembly Design Performance 8 8