CAD is an acronym for Computer Aided Design. At its most basic definition, CAD is a type of computer drafting program that allows you to create intricate drawings and technical illustrations in either two-dimensional or three-dimensional format. There are two types of computer drafting programs: raster -based and vector-based. Raster-based programs permit illustration through bitmaps, which are grids of pixels. One pixel has a value that signifies its color in the saved bitmap. Raster-based programs, although a type of computer drawing program, are not considered CAD programs, mainly because of their two-dimensional limitation. For high-detail drawings, there are vector-based programs. These programs use a more geometrical format; drawing is achieved through the use of points, lines, curves, shapes, and solids. All CAD programs are vector-based, as the geometrical system allows for greater accuracy and the ability to work in three dimensions. The people most likely to use CAD are graphics professionals, architects, and engineers, just to name a few. If you're interested in creating complex, three-dimensional drawings, you might find CAD a beneficial tool. For more information, consult a computer professional.
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