The USB, or Universal Serial Bus, is the most widely used computer connection device in the world. It enables computer users to connect a variety of peripheral devices to their computer systems with ease. Common USB accessories include keyboards, mice, printers, scanners, external storage devices, cameras and joysticks. Many of these devices are easy to install and use, but some require additional drivers and software. Once these devices are installed, they usually become an integral part of the computer system. USB accessories are especially popular among laptop users who can take their peripheral devices with them and easily keep them connected. Many USB-enabled devices provide their own power sources, allowing users to avoid carrying extra batteries and power cords with them. USB accessories have become much more than simple computer connection devices. They can also be used to transfer data between computers, and some even offer networking capabilities. Some of the newest USB accessories, such as USB flash drives and USB-enabled digital cameras, can be used to play music and videos, and even store data. As USB technology evolves, more USB accessories will become available. USB's growing popularity ensures that there will always be new and improved USB accessories to suit everyone's needs.