Printer, printer system, printer control method, and program therefor

摘要

A controller (4) for controlling a printer engine (7) used to print data on a medium determines an identification number based on received data, and prints the identification number together with print data based on the received data on the medium. Simultaneously, the controller (4) stores therein the identification number and the print data in an HD (6). With the construction, the identification number printed on the medium is inputted in the next and later printing operations. The controller (4) searches the HD (6) to retrieve and print the print data. Therefore, a copy of a quality as high as that of the original document can be produced.