The Universal Serial Bus is now the most common type of port on a computer.
It was developed in the late 1990s as a way to replace the variety of ports described above.
It can be used to connect mice, keyboards, printers, and external storage devices such as DVD-RW drives and flash drives.
It has gone through three different models (USB 1.0, USB 2.0 and USB 3.0), with USB 3.0 being the fastest at sending and receiving information.
Older USB devices can be used in newer model USB ports.