The USB specification was introduced in November 1995. USB was promoted by Intel, Microsoft, Philips and US Robotics. Originally USB was intended to replace the multitude of connectors at the back of PCs, as well as to simplify software configuration of communication devices. A USB system has an asymmetric design, consisting of a host, a multitude of downstream USB ports, and multiple peripheral devices connected in a tiered-star topology.[Wikipedia, USB]
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