Fax

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Short for telefacsimile, the art and technology within telecommunication for remotely copying images, especially affordable devices operating over the telephone network. Such faxes became affordable and very popular in the 1980s. They transfer one or a few printed or handwritten pages per minute in black-and-white (bitonal) in a resolution of 200 dots per inch. The transfer rate is 14.4 kilobit per second or higher. The transfered image formats are called CCITT fax group 3 or 4.