Connect a PS/2 compatible USB Keyboard to a computer through a PS/2 port USB Keyboard to PS/2 Adapter / USB to PS/2 Adapter Note: This is a replacement adapter that can only be used with USB keyboards that are both USB and PS/2 compliant. If you keyboard shipped with a similar adapter than this adapter will work with your keyboard. If your keyboard did not ship with a similar adapter than this adapter will not work with your USB keyboard