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CAD (Computer Aided Design) refers to software systems that are used in the drafting, creation, modification, analysis, or optimization of a design. As opposed to hand drafting, CAD drafting increases productivity improves design quality and design communications. CAD drafting is used for architecture, engineering and construction (AEC), as well as machining and manufacturing.
3D CAD comes in different “flavors” that are used differently and that require the CAD technicians to design their virtual components in a different manner for each. Here is a list of the types of 3D CAD this article discusses: