Patent ID: 8723802

Claim:
A portable electronic device, comprising: a display unit; a key operation unit; and a control unit that performs control of the display unit and the key operation unit, wherein the key operation unit includes: a plurality of first keys that are assigned with a first type character and a second type character; a second key, to which the first type character and the second type character are not assigned, and a plurality of functions are assigned; and a third key to which the first type character and the second type character are not assigned, and to which a function of making an outgoing telephone call based on characters related to the second type characters is assigned, wherein, when any one of the first keys is depressed in a state where an initial screen is displayed on the display unit, the control unit performs control such that the first type character assigned to the first key thus depressed and the second type character assigned to the first key thus depressed and conversion candidates corresponding to the first type character thus entered are displayed together on the display unit, wherein, while the control unit is performing control such that the first type character and the second type character are displayed on the display unit, in a case in which the second key is depressed, the control unit performs first processing for the first type character and performs control to notify what kind of processing is to be performed for the first type character, wherein, while the control unit is performing control such that the first type character and the second type character are displayed on the display unit, in a case in which the third key is depressed, the control unit performs second processing for the second type character and performs control to notify what kind of processing is to be performed for the second type character, wherein the first processing includes selecting a character from among conversion candidates related to the first type character in response to the second key being depressed in response to the second key being depressed, replacing the first type character with the selected character and cancelling displaying of the second type character in response to the second key being depressed, and wherein the second processing includes making an outgoing telephone call using characters related to the second type character as a telephone number in response to the third key being depressed.