On December 9, 1968, Stanford Research Institute scientist Douglas Engelbart demonstrated his unique invention--the computer mouse--for the first time in public. It took another decade and a half for it to catch on, but once it did, computing was never the same. And today, it's hard to imagine using a desktop or laptop computer without a mouse (or one of its latter-day substitutes such as the touchpad).
Above is Engelbart's first prototype mouse (held by its inventor). Note the square shape, hand-crafted wood case, and giant wheel inside. The part of this little beast that most resembles a modern mouse is the tail-like cord that gave it its name–though many mice do away with that today, of course. (Image from Wikipedia.)
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