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The Typewriter was the first keyboard and was created and patented by Christopher Latham Sholes in 1868.
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The Teletype was the next thing after the typewriter. It was invented in the 1930's
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During the 1940's the Binac computer was invented. It used an electromechanically controlled to feed input onto the magnetic tape.
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Introduced in 1961 and was produced by IBM. It was an electric keyboard and was very successful.
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By the 1960's and 70's all computers used electric impulses
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The reed switch keyboard was invented in the 70's and worked using a magnet and used metal filaments.
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Capacitive Switch keyboards worked by having little aluminum foil under the key cap. It was invented in the 1970's
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Was developed in the 1980s and was a popular keyboard and was invented and produced by IBM (no surprise)