When a message source user desires to advertise an object such as an event or
a sight-seeing resort on an electronic board, a write request is formulated with
a message and auxiliary information as to the position and state of affairs of
the object, and transmitted to a server finder. Using the position information
of the request, the server finder selects one of a number of message board servers
for retransmission of the request. On receiving the write request, the selected
server maps the contents of this request in a database. When a message recipient
user desires to read a message, a read request is formulated with auxiliary information
of a desired object and transmitted to the server finder, which retransmits it
to one of the servers corresponding to its position information. On receiving the
read request the selected server searches its database for messages having likeness
to the auxiliary information of the request.
