| 摘要 |
PURPOSE:To improve the sureness of sales information stored in the center storage device of a credit card company. CONSTITUTION:A card reader 2 which reads a credit card is provided. The availabiliy of the credit card is collated with a center device 17 of the credit card company using a communication circuit. The sales can be performed only when the credit card is available. In addition to the function performing the sales registration to a center storage device 23 of the credit card company, the sales information is stored at the time of normal sales registration. When job completion is detected by a job completion key, a modem transmits information on the sales stored in the terminal equipment to be collated with the sales information stored in the center storage device 23 of the credit card company till the end of the job completion. |
