| 摘要 |
PROBLEM TO BE SOLVED: To attain both of an accounting operation of an operator in a POS terminal device and a monitoring of the POS terminal device operated by a user.SOLUTION: A POS system 1 comprises: a first POS terminal device 5; and a plurality of second POS terminal devices 10. The first POS terminal device 5 receives a first accounting operation 9 including an operation of an accounting start from a user 2, and displays a first display mode 8 on the basis of the first accounting operation 9. The second POS terminal device 10 receives a second accounting operation 16 from an operator 3, detects the operation of the accounting start received by the first POS terminal device 5, determines whether or not to monitor the accounting operation to be received by the first POS terminal device 5, and displays a second display mode 13 based upon the second accounting operation 16 and a third display mode 14 including a part of the first display mode 8 and a part of the second display mode 13 by changing over between the second display mode and the third display mode on the basis of the determination. |
