Abstract: The present invention is directed to automatic generation of an operating button for instructing a processing to be executed by a computer on the basis of latest data and display thereof on a display unit, and comprises setting a button class corresponding to an arbitrary field of a plurality of data composed of a plurality of fields and stored in a memory, setting a button group that groups data values classified by the button classes and stored in the memory and individual buttons that correspond to the respective data values and displaying the button group and the individual buttons as an operating button on a display unit. The present invention not only enables the user to implement selection and direction by means of an operating button readily within a short time without the need of operation-related processing software for a menu, buttons, etc. but also facilitates maintenance.