PURPOSE: To register a large number of items by holding inputtable item data on a data file.

CONSTITUTION: An input processing system is composed of a data file 2-1 to register inputtable item data beforehand, a data input processing part 2-2 to input the data from this, an input output terminal 2-5 including a keyboard and a display, an input output processing part 2-4 and an execution control part 2-3 to supervise and control the action of respective these actions. Further, the above-mentioned item data registered beforehand are displayed one after another as a list screen in accordance with the instruction. The selection of an arbitrary number is accelerated and the selection item data are inputted. Thus, only by changing the contents of the data file, the contents displayed on the screen of an input output terminal can be changed.