A pointing device that can interface with a graphical user interface of a computer or other electronic device. In one embodiment, upon detecting that the user’s attention is leaving at least a portion of a screen, the system may alert the user of such an event. A conductive film is disposed on a first surface of the substrate and in electrical contact with the first terminal and second terminals. The physical network mapping provides information regarding the location of a service-providing device relative to a service-requesting device.