Abstract: Card information selecting system capable of accessing a card provided with a plurality of information channels corresponding to different transactions, includes reading means for reading information recorded on the card, selecting means for designating at least one of the information channels, writing means for recording information on the card, and processing means associated with the selecting means for reading information or recording the predetermined information on the selected channel.

Abstract: An electronic cash register comprising a keyboard having keys for cash registration, a card reader for reading the data recorded in a card, a communication control unit for communicating with a center provided with a customer file having stored therein information as to customers, a device for converting data relating to the credit standing of the customer and forwarded from the center to visible information, a memory for storing data as to cash registration and data as to credit inquiries, and a control unit for processing cash registration, controlling transmission of the data read from the card to the center to be made in response to a communicaiton starting instruction and controlling conversion of the data received from the center to visible information.