USB

Universal Serial Bus is an industry standard for high-speed serial connections between computers and other electronic devices. USB 1.1 supports up to 12 Megabits per second (12 Mbps). USB 2.0 offers speeds up to 480 Mbps, using the same physical connector. USB 3.0, released in 2010, supports up to 5 Gbps.
USB Type A connectors are used for device connections, and USB Type B connectors are used for Host (computer) connections.
A Mini-B type is also used- often for power or firmware updates. Most USB sources can provide 5V DC at up to 500ma to power external devices, although some (such as Apple iPad chargers) can provide up to 2A.

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