A three-port nonreciprocal circuit device has a structure in which one end of a first center electrode is electrically connected to an input external terminal via an input port, and the other end thereof is electrically connected to a ground external terminal. The packet includes source address information therein. The method includes receiving an authentication response indicating that the first computing device has been successfully authenticated. In addition, a service apparatus classifies and stores the multi-codes transmitted by the terminal, and supports the multi-codes to be circulated in at least one network device and to be regenerated as multi-codes including various additional information. The information is displayed at strategically located displays along the way to available spaces. The system receives information indicative of a target type and generates information indicative of an absolute geographic location for the target based on at least the target type and information output by the imaging device.