| 摘要 |
PURPOSE:To automatically delete a file in which data whose term runs out are stored in the data file of a host device for personal computer communication. CONSTITUTION:At the time of data registration from a terminal equipment 2, the term of validity of the data is also registered. Then, the file whose term runs out is detected and automatically deleted by a delete processing means 18 activated synchronously with the power source applying timing of a host device 1 for personal computer communication or the present date updating timing of a calender means. Also, in the file whose term of validity is not registered, a fixed period is added to the present date, and registered as a default value. Thus, a personnel or work required for file management can be unnecessitated, and the valid utilization of a storage device can be attained. Also, the delete of the file can be prevented from being forgotten by automatically deleting the file. Moreover, an access to the information whose term runs out can be prevented from being erroneously performed by a user. |
