| 摘要 |
PURPOSE:To prevent a program from being executed in a device other than a designated device at a time other than a designated time, by setting preliminarily an identification number of a processing device or the like, a program executable period etc. in the program. CONSTITUTION:Before the program execution, the program loaded to a CPU reads the identification number by an identification number adding mechanism 7. The processing device number of a used computer and the executable time are preliminarily set in this program in accordance with the contents of a contract or the like. The read identification number and the identification number set preliminarily to the program are compared with each other, and the execution is stopped if they do not coincide with each other. If they coincide with each other, execution date data is read by a perpetual clock 8 and is compared with the executable time set preliminarily to the program, and the execution of the program is started if this data is within the executable time, but the execution is stopped if it is not within the executable time. |
