發送短信 : A pragmatic approach to location-aware service organization and discovery

 ______    _    _    ______    __   __            
|      \\ | || | || |      \\  \ \\/ //     ___   
|  --  // | || | || |  --  //   \ ` //     /   || 
|  --  \\ | \\_/ || |  --  \\    | ||     | [] || 
|______//  \____//  |______//    |_||      \__ || 
`------`    `---`   `------`     `-`'       -|_|| 
                                             `-`