40. The system of claim 4 , further comprising a central repository for storing preferences of users of the plurality of navigational apparatus, the preferences including unique PLAs associated with an individual, group of individuals, or a corporate entity.
4. A system for providing informational services to a plurality of portable navigational apparatus configured to communicate via a wireless communications network, comprising: an interface for communicating with the plurality of navigational apparatus via the communications network, the interface configured for receiving a search query via the communications network from a first portable navigational apparatus, the search query comprising a proprietary location address (“PLA”) seeking to locate one or more locations of interest within a geographical area and locational information identifying the current location of the first portable navigational apparatus at the time of sending the search query; and a processor to complete a search of a central repository to identify an entity within a district of the geographical area uniquely associated with the PLA and to identify one or more locations of interest satisfying the search query received via the interface that are associated with the entity and limited in geographic scope by the locational information; wherein the interface is configured for sending a search result via the communications network to the first portable navigational apparatus, the search result comprising one or more locations associated with the entity identified by the PLA that have a relationship with the locational information.