IrDA
If you have a laptop or a PDA, you probably have an infrared port. Named after the Infrared Data Association, which oversees the system, IrDA is supposed to be a simple way to replace cables when printing or sending data to another PC. Millions of them are installed worldwide, theoretically making it one of the world's most popular standards. Of all wireless data technologies, its installed base is second only to SMS.
But despite its ubiquity, IrDA is hardly ever used. This is partly because at first it didn't work very well; different companies implemented the system in different ways. Although these early problems have been ironed out, the perception has stopped people from using it, which in turn has stopped vendors from implementing ...
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