PURPOSE: To obtain an information processor with high operability by storing function menues to be usually frequently used by users or previously selected function menues and selectively executing the stored contents.

CONSTITUTION: Function menues selected from a memnu selecting device 1 for selecting a function menu displayed on a display device by a user and executed are stored in a selected menu registering buffer 3 for temporarily storing the function menues together with the using frequency information as the list of the limited number of function menues. The function menues to be usually frequently used by the user or previously selected function menues are displayed in the using frequency order so as to be displayed. Consequently, a required function menu can be simply selected and executed.