| 摘要 |
A communication system is proposed for transmitting at least one of the data, the program, and a combination of them from a host facility to a communicator such as a communication terminal device. In this communication system, the data or the program becomes unable to be used when a predetermined time has elapsed after it is transmitted from the host facility to the communicator. This communication system is provided with the function of giving a warning before the use of the transmission becomes unable and the function of resuming the use in accordance with the user's instruction even after the use becomes unable.
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