A player can easily select a desired game, and the information about
players can be appropriately managed and provided. A user terminal
transmits self-introduction information to a room master. The room master
adds the self-introduction information from the user terminal to the
player table list. Additionally, the self-introduction information is
added to update history data, and a count value of the update history
counter is incremented. The user terminal adds the current count value of
the update history counter and ask the room master for an update history.
Upon receipt of the update history requests from multiple user terminals,
the room master transmits data to all user terminal members (addressed to
the IRC channel) in the room. The data is transmitted sequentially from
the update history data associated with the oldest update counter value
in the requests to the update history data associated with the latest
history counter value of the room master.