To improve convenience by storing the execution frequency of selected processing items, comparing the execution frequency of the respective processing items, defaulting and marking the processing item having the highest execution frequency.

When the prescribed processing item is selected out of plural processing items and the execution is instructed by an input part 114, a display part 115 displays the processing item and an execution frequency storage part 111 stores the execution frequency of the selected processing item. Then, a default deciding part 112 compares the execution frequency of the respective processing items and defaults the processing item having the highest execution frequency, and a picture display control part 113 marks the defaulted processing item. Thus, the selecting operation of the processing item having the high execution frequency can be simplified, and the average work efficiency of a data processing system can be improved. Besides, a user can freely set the value of execution frequency and can default the desired processing item, and the convenient data processing system can be provided.