A permeable conductive shield providing protection from electromagnetic interference and electrostatic discharge has a laminated structure suitable for application to the foil side or the component side of a circuit board. With this configuration, it is possible to prevent the occurrence of damages of the MR element due to static electricity or the like. Since the service capabilities information is retrieved from the server program and is dynamically maintained by the server program, the client program need not be updated when available services from the server program are modified.