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What does USB mean?

USB means Universal Serial Bus

USB is a standard for connecting peripheral devices (mouse, keyboard, scanner, printer, photo camera, etc.) to a computer. USB has come as a replacement for parallel and serial ports. One advantage of USB is that it can take care of the power supply of the connected peripherals, also USB devices can be connected without having to restart the computer (also called hot-pluggable or hot-swappable). By now we have already arrived at version 3 of this standard. Https://www.youtube.com/watch?v=-yExrqFfdsU

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