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USB is an acronym for Universal Serial Bus, the successor to earlier computer peripheral connections such as parallel and serial ports. It is an interface (like Firewire) that connects a wide variety of plug and play devices to the computer. These devices can be connected and disconnected without the need of a restart of shutdown of the PC. USB devices include external HDD's, the USB mouse and keyboard, flash memory devices, and printers.

USB 1.1 is obsolete.

USB 2.0 is currently the most popular interface used.

USB 3.0 is out, but still in its early days.

With each USB version release comes new features, such as backward compatibility with previous standards and speed enhancements.

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9y ago

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