PURPOSE: To attain regular operation communication by the same operation from respective terminals by providing a detachable storage means which stores control information controlling connection with MHS in correspondence with a prescribed display pattern.

CONSTITUTION: Input information related to an operation from a key group 2 is stored in the external memory 1 by a control part 3 and operation information is registered. The memory 1 is the detachable storage device which is backed up by a battery and it can be connected to the other terminals. At the time of connection to the other terminals, the control part 3 calls a registration content from the memory 1 by the input of the prescribed key in the key group 2. For the communication of MHS(message handling system), various values of items are inputted by the application. when operation information are registered as the operation of a one touch button A in the key group 2, an input operation for transmission completes from next time only by depressing the button A. Consequently, an operation content is stored by the image of panel display and it is related to the button A.