| 摘要 |
PROBLEM TO BE SOLVED: To provide a POS system which can quickly recover its fault if occurred. SOLUTION: A POS system includes the POS registers 1 which are installed at the stores A and B, an operation management device 24 which is installed at a maintenance company C and connected to the registers 1 via a circuit, and a transaction file which is contained in each register 1 and records the error line No, the business work contents and the error state if an error occurs while a program is carried out. |
