| 摘要 |
A portable communication terminal (300) obtains a program for terminals (115) from a host computer (110) and executes it. The program for terminals (115) obtains all or a part of data stored in a database server (111) from the host computer (110) and renews the obtained data. The renewed data is sent to the host computer (110), and the data in the database server (111) is renewed.
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