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"Sketchpad pioneered the concepts of graphical computing, including memory structures to store objects, rubber-banding of lines, the ability to zoom in and out on the display, and the ability to make perfect lines, corners, and joints. This was the first GUI (Graphical User Interface) long before the term was coined."
–- from a Sun Microsystems biography of Ivan Sutherland
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In 1968 Engelbart created NLS (oNLine System), a hypermedia groupware system that used the mouse, the windowed GUI, hypermedia with object addressing and linking, and even an early version of video teleconferencing to wow its audience, a group of technicians, engineers, and scientific types at Stanford University.
However, Engelbart was not the only visionary in the history of GUI. In 1963 a grad student at MIT, Ivan Sutherland, submitted as his thesis a program called “Sketchpad,” which directly manipulated objects on a CRT screen using a light pen.
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