A user may locate a missing wireless device through a location server storing user-associated location information. A wireless device includes a client location application adapted to determine a current geographic location and transmit location data to a location server, a power source, and a power management application adapted to detect a low power level and instruct the client location application to determine the current geographic location. The wireless device further includes a GPS receiver adapted to receive and decode GPS signals and a personal GPS directory storing location information associated with the subscriber unit.

 
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> Autonomous reference system and method for monitoring the location and movement of objects

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