jan 1, 1963 - Sketchpad - Ivan Sutherland: First object-oriented programming system, early interactive display graphics.
Description:
Ivan Sutherland's 1963 Ph.D. thesis project, a program to help in drawing blueprints from points, line segments and arcs of circles, pioneered both object oriented programming and the ability to draw on a screen (using a light pen; the mouse hadn't been invented yet). It was one of the first programs with an interactive graphical user interface, so people who weren't computer programmers could use it easily.
Search for "Sketchpad" on YouTube to see a demonstration of this software.
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History of Computers
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