If the 'Mapper' option was selected in the Keyboard field,
you must enter the driver name for the keyboard here.
Both the Programmatic ID and the Logical Device Name can be used as the Device Name for the keyboard.
You can find the Programmatic ID and the Logical Device Name in the registry:
HKEY_LOCAL_MACHINE\SOFTWARE\OLEforRetail\ServiceOPOS\POSKeyboard.