When a plug-in application \u201cHDD Backup Utility\u201d is designated by the user from the start menu, an administration program is started. The resistor includes a first electrode; a resistive layer on the first electrode; an electric field enhancement array in the resistive layer; and a second electrode on the resistive layer. In the case of two gratings, two tuning currents, instead of 3 tuning currents in a typical laser, are needed. The digital controller is powered by the DC output voltage and adjusts the DC output voltage by controlling the output stage. The frame focuses a person’s attention onto the active graphics.