IEEE 1394, better known as FireWire, is a standard connection type for many electronic devices, such as digital video cameras, printers and scanners, external hard drives and other peripherals.
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The terms IEEE 1394 and FireWire generally refer to the types of cables, ports, and connectors used to connect these types of external devices to computers.
USB is a similar standard connection type for devices such as flash drives and printers, cameras and many other electronic devices. The latest USB standard transfers data faster than IEEE 1394 and is more widely available.
Apple's brand name for the IEEE 1394 standard is FireWire. When someone talks about IEEE 1394, they usually hear the term FireWire.
