~Universal Serial Bus (USB) is an industry standard developed in the mid-1990s that defines the cables, connectors and communications protocols used in a bus for connection, communication and power supply between computers and its peripherals (including keyboards, pointing devices, digital cameras, printers, external disk drives etc.)
It has become commonplace on other devices, such as smartphones, PDAs and video game consoles. USB has effectively replaced a variety of earlier interfaces, such as serial and parallel ports, as well as separate power chargers for portable devices.
The USB 2.0 specification was ratified by the USB Implementers Forum (USB-IF) at the end of 2001 achieving 480 Mbit/s and power output of max. 500mA.
The USB 3.0 specification was published on 12 November 2008. Its main goals were to increase the data transfer rate (up to 5 Gbit/s), decrease power consumption, increase power output up to 900mA, and be backwards-compatible with USB 2.0. USB 3.0 includes a new, higher speed bus called SuperSpeed in parallel with the USB 2.0 bus. The first USB 3.0 equipped devices were presented in January 2010.
USB 3.1 increase the data transfer rate (up to 10Gbit/s) and with quick charging.
