A user enters a numeric string on a standby screen of a cellular telephone , and then presses a predetermined function key, the numeric string being obtained by numerical conversion of a keyword related to a piece of registration information, e.g. a destination e mail address, in accordance with {HEAD ~ an assignment relationship} between {TAIL ~ characters} and numerical keys 
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A user enters a numeric string on a standby screen of a cellular telephone , and then presses a predetermined function key , the numeric string being obtained by numerical conversion of a keyword related to a piece of registration information , e.g. a destination e mail address , in accordance with { HEAD ~ an assignment relationship } between { TAIL ~ characters } and numerical keys
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