GROUP OPERATION SYSTEM

PURPOSE:To obtain the same result at all terminals by inputting a received command from a center device to all terminals including a terminal as a transmission origin through respective keyboard input communication control interfaces. CONSTITUTION:A document editing command which is inputted from the keyboard 111 of a terminal 101 is sent to the center device 110 through a communication control interface 113. Then the device 110 inputs the received command to the application programs 211, 221, and 231 of terminals 101, 102, and 103 through the key board input communication control interfaces 214, 224, and 234. Then the application program 211 of the terminal 101 edits th document file 212 of its terminal according to the command, the application program 221 of the terminal 102 edits the document file 222 of the terminal according to the received command, and the application program 231 of the terminal 103 edits th document file 232 of the terminal according to the received command.