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 {HEAD ~ registration information}, e.g. {TAIL ~ a destination e mail address}, in accordance with an assignment relationship between characters and numerical keys 
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 { HEAD ~ registration information } , e.g. { TAIL ~ a destination e mail address } , in accordance with an assignment relationship between characters and numerical keys
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