HP EliteBook 820 G1 Notebook PC - Manual (Page 55)

Using a USB device
Universal Serial Bus (USB) is a hardware interface that can be used to connect an optional external
device, such as a USB keyboard, mouse, drive, printer, scanner, or hub.
Some USB devices may require additional support software, which is usually included with the
device. For more information about device-specific software, see the manufacturer's instructions.
The computer has at least 1 USB port that supports USB 1.0, 1.1, 2.0, or 3.0 devices. Your computer
may also have a USB charging port that provides power to an external device. An optional docking
device or USB hub provides additional USB ports that can be used with the computer.
Using a USB device 45