| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a data backup system by an information system backing up data of many electronic terminal units connected to the Internet through the Internet in a concentrated manner. SOLUTION: A plurality of electronic terminal units are individually connected with the Internet, a server for managing data is connected with the Internet, and data held by each electronic terminal unit is transmitted to the server for managing data through the Internet to backup data of each electronic terminal unit.</p> |
