Basic personal data of an individual is stored as different data files based on content or intended use. The height of a rear wall and a side surface of the tank holder are set to be lower than corresponding heights of the ink tank. The connection contacts are formed to align with, and contact, attachment pads formed on the motherboard or other system component. The EMI shielding device is positioned between the power supply and the inverter, with the first engaging portion inserted into the printed circuit board and the second engaging portions engaging with the printed circuit board. 5 dlg, and methods for their preparation.