Credit card information management system

A credit card information management system, comprising:

• a host computer located at a card management center,
• a transmission facility connected to the host computer for broadcasting wirelessly digital data signals of card information in the host computer, said card information including classification of validity of credit cards of customer members of a credit company and information of creditability,
• receiving facilities equipped in member stores of the credit company for receiving the digital data signals broadcasted by the transmission facility,
• card readers located at the member stores for reading the credit cards of credit card users,
• terminal computers located at the member stores and connected to the respective receiving facilities to receive the digital data signals therefrom, each of the terminal computer receiving the card information broadcasted through the transmission facility, selecting the card information for each of the member stores, storing including renewing the selected card information in a memory and outputting a card information of a credit card inputted into the card reader, each terminal computer having a modem, a data extracting feature, a memory feature, a data missing detection feature, a request feature, a transmission feature and a receiving feature, said data extracting feature extracting a specified portion of digital data outputted from the receiving facility and outputting the data to the memory feature and the data missing detection feature, said memory feature storing the data outputted from the data extracting feature and data inputted from the receiving feature to compensate the missing data, said data missing detection feature analyzing correction between output from the data extracting feature and the data received in a past and outputting a data request instruction to the request feature by detecting missing data, said request feature requesting data of the missing portion to the transmission feature if there is a missing portion, said transmission feature sending request data of the missing portion to the host computer, and said receiving feature receiving data corresponding to the missing portion responded by the host computer and outputting the same to the memory feature, and
• telephone lines connected between the host computer and the respective terminal computers through the modems,
• wherein said host computer has a function of responding to the terminal computer to send the missing data through the telephone line upon request from the terminal computer so that in case the terminal computer finds that there is the missing data in the received card information, the terminal computer requests the missing data to the host computer through the telephone line, and stores the missing data in the memory after receiving the missing data from the host computer through the telephone line.