PURPOSE: To efficiently realize the conservation of labor and resources with respect to additional printing by providing a storage part storing once printed information and a comparison part comparing printing data with additional data reutilizing once printed paper at the time of additional printing to print only an additional part.
CONSTITUTION: An information storage part 108 storing once printed information and a comparison part 110 comparing printed information with additional information are provided and, at the time of additional printing, once printed paper is reutilized to print only an additional part. That is, when there is a piece of information to be added to once printed documents, the once printed paper is reutilized without again newly applying printing to new paper and only the additional part can be printed and, therefore, the conservation of labor and resources can be efficiently realized with respect to printing.
ISHII TOSHIBUMI
SASAKI AKIO
HITACHI COMPUTER ENG