most of the time the infrared is used on printers that are designed to use it
also it can be used for networking
Quote:
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Infrared is used in a variety of wireless communications, monitoring, and control applications. A few of the applications include home-entertainment remote-control boxes, wireless local area networks, links between notebook computers and desktop computers, cordless modems, intrusion detectors, motion detectors, and fire sensors
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http://searchnetworking.techtarget.c...214039,00.html 
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