1. The ICBC POS machine pre-authorization confirmation displays RSP: 54, which means that the pre-authorization has been confirmed and repeated transactions are invalid.

2. POS is a multi-functional terminal. It can be installed in the credit card merchants and acceptance outlets and connected to a computer network to realize automatic transfer of electronic funds. It has the functions of supporting consumption and pre-authorization. , balance inquiry and transfer functions, which are safe, fast and reliable to use. It is difficult to obtain basic business information in bulk transactions. The introduction of POS systems is mainly to solve the blind spots of information management in the retail industry. An important part of the chain store management information system.