USB cables are "Hot Pluggable", in other words you can connect and disconnect the cables while the computer is running without fear of freezing the computer

USB cables are fast, transferring up to 10Gbps. Compare that to serial communication which transfers data at about 20Kbps

USB cables carry power as well as signals. This allows for "USB powered" gadgets as well as recharging batteries in cameras and other USB peripherals

USB cables are designed with several distinct connector types, making it easy to identify which plug goes into the computer and which plug goes into the peripheral device

USB cables are a universal standard and are fairly easy to find and to afford.

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