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Controlers have potentiometers which are knobs on the controler used to move your in game character.
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Integrated the twist top for the controler to also move your in game character.
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The game and watch was a hand-held divice that had a clock and an alarm. With the game and watch aslo came the D-Pad which changed the display of video game controler.
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The Joystick was also invented at this time which was used with the Atari.
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