Abstract: There are provided, on the POS device unit side, a physical keyboard having a plurality of physical keys arranged thereon; a screen keyboard comprising a plurality of screen keys arranged and displayed on a screen having a touch panel arranged thereon adjacent the physical keyboard; and a key data transfer control unit which connects each of the physical keyboard and the screen keyboard to an input port, and transfers key data from an output port in accordance with the sequence of key operations of the physical keyboard and the screen keyboard. A keyboard control unit which notifies the key data transferred from the key data transfer control unit to the application processing unit for execution of processing is provided in the POS main body. When physical keys and screen keys are operated in succession, the key data are transferred in the sequence of key operations and notified to the application.

Abstract: The present invention has been made to allow a user to easily grasp the operation area and thereby to easily and quickly perform the operation even in the case where the operation area extends across the entire system. An operation guidance display unit displays the entire appearance of a system to be operated as well as displays the operation position, in a specific manner, relative to the entire appearance of the system to thereby provide guidance of the operation position in the entire system and further displays, in an enlarged manner, the operation method related to the operation position displayed in a specific manner to thereby provide guidance of the operation method.

Abstract: There are provided, on the POS device unit side, a physical keyboard having a plurality of physical keys arranged thereon; a screen keyboard comprising a plurality of screen keys arranged and displayed on a screen having a touch panel arranged thereon adjacent the physical keyboard; and a key data transfer control unit which connects each of the physical keyboard and the screen keyboard to an input port, and transfers key data from an output port in accordance with the sequence of key operations of the physical keyboard and the screen keyboard. A keyboard control unit which notifies the key data transferred from the key data transfer control unit to the application processing unit for execution of processing is provided in the POS main body. When physical keys and screen keys are operated in succession, the key data are transferred in the sequence of key operations and notified to the application.