Department of Defense's Advanced Research Projects Agency (ARPA-now DARPA), was also the first system to successfully use hypertext to link files (making information available through a click of the mouse).īecause his patent for the mouse expired before it became widely used with personal computers in the mid-1980s, Engelbart garnered neither widespread recognition nor royalties for his invention. NLS, which Engelbart developed with funding from the U.S. Mice grew more ergonomic over time and have adopted trackballs, lasers and LEDs, but the premise is the same-the computer records both the distance and speed at which the mouse travels and turns that information into binary code that it can understand and plot on a display screen.Įngelbart originally invented the mouse as a way to navigate his oNLine System (NLS), a precursor of the Internet that allowed computer users to share information stored on their computers. When the mouse was moved, the vertical wheel rolled along the surface while the horizontal wheel slid sideways. The wheels-one for the horizontal and another for the vertical-sat at right angles. The original mouse, housed in a wooden box twice as high as today's mice and with three buttons on top, moved with the help of two wheels on its underside rather than a rubber trackball. "It started that way, and we never did change it." "I don't know why we call it a mouse," he said during the demo. to acknowledge his technology, which provided the tool needed to navigate graphics-filled computer screens with a simple motion of the hand rather than by wading through screens filled with green-tinted text using keys or a light pencil pressed up against a computer monitor. This event-attended by some 1,000 computer professionals-would later be called by many the "mother of all demos" and would introduce a number of computing capabilities largely taken for granted today: the mouse, hypertext, object addressing and dynamic file linking.Įngelbart, now 84, filed the patent in 1967 but had to wait three years for the U.S. ![]() A little more than 40 years ago Douglas Engelbart introduced his "X–Y position indicator for a display system"-more commonly known today as the computer mouse-during a 90-minute presentation on a "computer-based, interactive, multiconsole display system" at the Stanford Research Institute (SRI) in Menlo Park, Calif.
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