| 摘要 |
According to a conventional pager generally avalable, mere characters and symbols can be transmitted and received. In addition thereto, since code sets that can be transmitted and received are limited, data other than messages can not be transmitted and received. However, information management section of the present invention, when transmitting and receiving of data, such as schedule data, including codes other than the code sets, the data should be converted into data in a form of message before carrying out the tranmitting and receiving. Therefore, it is possible to transmit and receive a variety of data prepared in a form other than in a form of message. When transmitting of data, only the part that has been changed is transmitted while the information management section of the addressee changes only the part corresponding to the data that has been changed, i.e., the unchanged parts of the file are not changed. Therefore, it is possible to update data with remarkably little communication amount. The information management section of the addressee displays the changed part in a manner so as to be discriminated from other unchanged part. Accordingly, the user can identify the changed part.
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