Universal Serial Bus is popularly known by its abbreviation-USB.
It used mostly to connect computers to peripheral devices such as cameras, camcorders, printers, scanners, and more.
USB is not merely a cable, but also comes in the form of devices (for example, flash drives and 3G). USB cables and / or devices connect to something called a USB port on your PC. this cables are universal standard and are fairly easy to find. USB ports have become a go-to source of data transfer. Here is all the history explained about its generations in detail.