Patent ID: 6898626

Claim:
A communication system comprising: a communications network; a message source terminal for transmitting a write request containing a message of an advertised object and auxiliary information as to the position and state of affairs of the object; a message recipient terminal for transmitting a read request containing auxiliary information as to the position and state of affairs of an object; a plurality of message board servers connected to the network; and a server finder for receiving said write request from the message source terminal via said network, selecting one of said servers based on the position information of the write request and retransmitting the write request via the network to the selected server, and for receiving said read request from the message recipient terminal via said network, selecting one of said servers based on the position information of the request and retransmitting the read request via said network to the selected server, each of said servers receiving said write request from said server finder and storing contents of the write request in an entry of a database, and receiving said read request from said server finder and making a search through said database for detecting a plurality of messages having likeness to the contents of the received read request.