USB: (abbreviation for "Universal Serial Bus") The latest generation of serial bus technology that can transfer data at up to 12 Megabits/second, can be daisy chained (with up to 127 devices on a single port) and can provide power from the computer's power supply to peripherals (so that peripherals do not need their own AC power). USB "hubs," boxes that provide multiple USB ports and a power boost to the USB chain are usually needed if you have more than a few USB devices on your machine. USB also allows hot-plugging so that you can plug and unplug peripheral devices without having to shut down your computer.
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