PURPOSE: To realize a small and light-weight structure for each terminal unit and thus facilitate an easy movement to the optional place by providing the punching machine at the center side and then securing the request of the self-side card punch to the center side via the operation of the key input part of each terminal unit.

CONSTITUTION: Circuit control unit 7 which controls the data transfer is connected to center unit 1 and between circuits 8-0W8-n, and furthermore data processor 3 to receive the data plus punching machine 5 to perform the card punch in accordance with the indication given from processor 3 are installed to unit 7. Then column display part 9, punch contents display part 10, data input key part 11 and control key part 12 are provided to terminal units 2-0W2-n which are connected to circuits 8-0W8-n. With start of operation of units 2-0W2-n, processor 3 decides the punch code and informs it to units 2-0W2-n along with display given at display part 10 of units 2-0W2-n each to secure the mutual liaison. Then the card punching is given via machine 5 of unit 1 and according to the operation of input part 11 and key part 12.