![]() ![]() ![]() It was described as the “first commercially available integrated, interactive graphics design, drafting, and manufacturing system." Approximately 9 out of 10 CAD programs find their roots in ADAM. In 1971, Hanratty developed a program called ADAM. Just two years later, in 1963, Ivan Sutherland designed a system that “broke new ground in 3D computer modeling and visual simulation, which is the basis for CAD.” Sutherland called his program Sketchpad, and explained it “let designers use a light pen to create engineering drawings directly on a CRT.” While working for General Electric, Hanratty developed a program he called DAC, the first system which used interactive graphics and a numerical control programming system. The origins of CAD trace back to the early 1960s systems of Patrick Hanratty and Ivan Sutherland. ![]() Popular CAD software options in construction. ![]()
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