| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the conventional problem in change of an identifier such as a mail address in which since there is no means for acquiring the past use history for an identifier after change, change and registration of the identifier are directly performed when it is changeable to an identifier desired by a user. <P>SOLUTION: A computer is made function as a receiving means for receiving an identifier such as mail address, a determination means for determining whether the identifier was used in the past or not, and a display means for displaying, when it is determined by the determination means that the identifier has been used in the past, the use history of the identifier. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
