| 摘要 |
Advertising or sales promotion information can be additionally printed on a sales receipt without changing the POS application of the POS system, which includes a terminal computer for generating first print (e.g., sales) data based on transaction information, a server for generating second print data comprising advertising or sales promotion information, and a printer in which an interface device for communication with the terminal computer and the server is installed. The interface device has a first print data processing unit and a second print data processing unit, the former of which passes the first print data received from the terminal computer to both the printer and server. The server generates the second print data based on the content of the first print data, and then sends the second print data to the interface device, which sends that data to the printer.
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