The electronic pencil

Computer-aided design systems are most useful where large numbers of similar drawings are used. Office and kitchen layouts, where identical items of furniture are laid out in different ways for different clients, are a good example of an area where CAD can save time and money. Outlines of the individual pieces can be stored in the computer's memory and then recalled and positioned on the display unit with ease. The designer can then move the images around on the screen until he is satisfied with the layout. The resulting screen image can then be passed to a micro-chip controlled drawing-board and turned into a high quality tracing, complete with any comments or measurements required. The electronic image of the completed drawing can be stored, recalled, and altered very easily.

More sophisticated systems are being developed where specially prepared working drawings fed into the computer can be shown on the display unit as composite images. These












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