<p>The control system operates with a terminal connected to a communication network. The terminal is connected to a keyboard and has a chat function of making communications with other terminal in real time, to execute communications with each other. A terminal on the transmitting side describes in the communication command to be transmitted a mode corresp. to a function that is to be executed and the code of the communication in the mode, and indexes the connection timing table. According to the content of the connection timing table, establishment and release of connection of the communication to the other terminal are executed in order to efficiently use the communication network. @(94pp Dwg.No.1/31)@.</p>
