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USBThe Universal Serial Bus (USB) is a new device communication standard developed by the computer and telecommunication industries. It is aimed at replacing most of the different kind of special interfaces such as conventional serial and parallel ports. Most of the new PCs and Macs have USB connectors at this point, and the number of peripherals is increasing exponentially. USB provides power to the devices connected to it. USB 1.1 provides 12 Mbit/s and 1.5 Mbit/s data transmission speeds. USB can't be used directly as a fast connection between PCs, but there are special products which allow small scale networking using USB bus. USB provides a powerful, hot-plug-capable, "true plug-and-play" interface between a host computer and add-on peripheral devices.
These devices can be just about anything: keyboards, mice, joysticks, telephones, scanners, printers, security dongles, microphones, speakers, floppy drives, cameras, modems, CD-ROM drives, etc. USB was designed to improve on earlier peripheral connection technologies. USB allows end-users to connect peripheral devices to a host computer on the fly, without having the user hassle with:
In addition, USB provides:
USB devices use two types of plugs, Type A and Type B:
Here are a few USB links:
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