An information processing apparatus capable of easily inputting a telephone number. In a cellular phone equipped with jog dial, displayed on LCD display 18 of such a cellular phone are the telephone number display section and fixed cursor. Also displayed on the LCD display are a substantially arc shaped line and digits at the periphery of such arc. When the jog dial is manipulated upwardly, the digits displayed at the periphery of the arc are moved downwardly. Upon depressing the jog dial, the digit displayed in the cursor is additionally displayed in the telephone number display section.