Classified in Computers

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A Joystick is another input device you can connect to a computer system. The Joystick is able to move in eight directions. Joysticks are mostly used in computer games to control the way a picture on the screen moves. A Trackerball works to exactly the same way as a mouse, except that the ball is on the top. A Light Pen acan be used to draw pictures directly on to a computer screen or to read the pattern on a barcode. Using a Scanner, you can input printed drawings, photograph or text into a computer

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