USB 2.0 - Universal Serial Bus
USB means Universal Serial Bus.
USB 2.0 (Hi-Speed USB) devices have a maximum communications speed of 480 Mbit/s (60 MB/s) per controller, shared amongst attached devices. Up to 127 devices can be connected to a host controller.
USB can connect computer peripherals such as mice, keyboards, digital cameras, printers, personal media players, flash drives, and external hard drives.