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USB 3.0 is the third major revision of the Universal Serial Bus (USB) standard for computer connectivity. The USB 3.0 specification uses the same concepts of USB 2.0 but with many improvements and totally different implementation. Earlier USB concepts like endpoints and four transfer types (bulk, control, isochronous and interrupt) are preserved but the protocol and electrical interface is significantly different. It is so different that the specification defines a physically separate channel to carry USB 3.0 traffic. The changes in this specification make improvements in the following areas: 1. Transfer speed 2. More bandwidth 3. Power management and 4. Improved bus utilization USB 3.0 is said to be making it's first commercial appearance in windows 8 installed devices