your notebook features a full-size keyboard that has the full functionality of a desktop computer keyboard. many of the keys have been assigned alternate functions, including shortcut keys for windows, function keys for specific system operations, and the pad lock keys for the numeric keypad.
you can attach an external keyboard to the notebook using a usb or ps/2 port. you do not need to shut down the notebook to connect a usb keyboard.
attaching a ps/2 keyboard to your notebook or port replicator while the notebook is running may turn off the built-in keyboard.