Thermal copiers; parts and fittings for thermal copiers and photocopiers, namely, equipment incorporating punching function for copiers; equipment incorporating stapling function for copiers, equipment incorporating function of folding paper for copiers; equipment incorporating sorting function for copiers, automatic manuscript feeding device for copiers, and paper feed tray for copier; photosensitive drums for thermal copiers and photocopiers; thermal print heads for document printers and plotters; network servers; print servers, namely, network servers; document data management servers; image data management servers; display monitors for servers; back-up power supply devices; network servers for management of device operation histories; communications servers for management of expense data, log data; communications and network servers for use in management services of official documents and family register information in the nature of financial, insurance, education and medical information; data aggregation devices, namely, apparatus and instruments for recording, transmitting, reproducing or processing data