The present invention provides a system, method and software for linking persistent and unique business identifiers, associated with business entities, for associating corresponding business records without a loss of historical records, regardless of subsequent changes, updates, and mergers. The current detect module transmits a GEN_ON signal to the modem when a current is present in at least one of the first and second power conductors. Directional information acquiring means 102 detects a direction of the device to acquire directional information. The first and second sections overlap when the finger engages the groove.