A thread forming tap comprises an elongated body, having at a first end a connector portion and at a second end a thread forming portion, said thread forming portion comprising at least one thread forming thread having a noncircular cross-section including at least three lobes for plastically deforming an interior wall of an opening while forming an internal thread. One terminal of a series connection of the battery cells in the first and second groups and one terminal of the first monitoring unit are connected, the other terminal of the first monitoring unit and one terminal of the second monitoring unit are connected, and the other terminal of the second monitoring unit and the other terminal of the series connection are connected. The buffer fluid in the first buffer chamber helps remove any residual corrosive fluid that may remain on the actuator translation member as it moves into the actuator housing, and any fluid that leaks into the second chamber will boil as a result of the vacuum pressure therein. The doped region is formed by an implant in which the select gates of adjacent cells are used as a mask. In one embodiment, whether or not the button is illuminated and the color of the illumination, convey information about the function that is to be performed when the button is pressed. Then, the voice input from a user for this output is voice-recognized, and controls obtainment of a new document and next analysis based on designation information corresponding to the input candidate matching the recognition result.