USB

USB stands for universal serial bus. It is an interface — an agreed standard for connecting a device to a computer and transmitting data between them. It uses serial transmission: the bits travel one after another along the connection. Because both ends follow the same agreed communication standard, a device made by one manufacturer can be plugged into a computer made by another and the two can exchange data. The name describes the design: universal (one widely supported standard for many kinds of device), serial (bits one after another) and bus (a shared connection system carrying data and power between the computer and the connected devices).