(1) Any device that systematically breaks up an image into picture elements (or pixels) and records some attribute of each picture element. The sweep of a scanner's mirror, prism, antenna, or other element across the track (direction of flight) may be straight, circular, or another shape. (2) an input device that takes in an optical image and digitizes it into an electronic image represented as binary data. This can be used to create a computerised Version of a photo or illustration. (3) A radio Receiver that moves across a wide Range of radio frequencies and allows audiences to listen to any of the frequencies.

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