Definition – What does USB mean?
USB (Universal Serial Bus) is a common interface that enables communication between different devices and host controller such as a personal computer. It connects devices such as digital cameras, mice, keyboards, scanner, external hard drive and lots of other computer devices. Because of its extensive variety of uses, it includes support for electric power, and the USB has replaced a range of interfaces like the parallel and serial port.
Glossary Web explains USB
A USB is specially designed to enhance plug-and-play and enable hot swapping. Plug-and-play enable the operating system to spontaneously configure and find a new device without having to restart the computer. As well as hot swapping allow removal and replacement for a new device without having to reboot.
Today, there are multiple types of USB connector are available to use, the majority of USB cables are one of two types such as type A and type B. A normal USB standard is type A that has flat rectangle interface that inserts into the hub or USB host that transmit data and supplies power. A mouse or keyboard are most common examples of a type A or USB 2.0 connector. A type B USB is square with biased exterior corners that are connected to an upstream port which uses a removable cable such as a printer. Type B also change data and supplies power; type B connectors do not have a data connection, only used a power connection.