Earlier computer keyboards were based either on teletype machines or keypunches. By the late ’70s and early ’80s, all computers used electronic keyboards. The layout of the computer keyboard still owes its origin to the inventor of the first typewriter, Christopher Latham Sholes. He also invented the QWERTY layout, and laid out the keys in such a way that common two-letter combinations were placed on opposite sides of the keyboard so that his mechanical keyboard would not jam.

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