| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a usage display system for displaying usage without carrying out linkage such as direct exchange of database information between customer databases managed by separate companies nor inputting authentication information by a user; and to provide an information terminal and its program. <P>SOLUTION: Authentication information is provided to this information terminal 113 connected to a first server 104 from a first customer database 106, the authentication information is presented in connecting a second server 108, and thereafter, for instance, an installation worker of a usage measurement means 101 registers authentication information used for usage display in a second customer database 110 by using an authentication information variation means 111 provided by the second server 108, whereby data linkage between the first customer database and the second customer database by exchanging the authentication information via the information terminal, and usage can be displayed without carrying out customer database linkage nor inputting the authentication information every time. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
