Provided is a method of manufacturing a flash memory device. The computer part determines that the storage part is abnormal when a sum, which is obtained by summing the steering angle of the steering wheel and the rotational angle of the electric actuator after the checking of the unlocking of the transmission ratio variable mechanism by the computer part, differs from the initial sum, which is retrieved from the storage part. The wiring layer includes a plurality of wirings and an insulating layer that covers the plurality of wirings that are laminated above the substrate. In the locked position, the leaf spring is releasably secured to the elongated member, preventing movement thereon. An index of bookmarks identifying sections of the digital version of each document is generated. In one embodiment, an apparatus for generating pseudo-random numbers using linear feedback shift registers comprises a digital hardware.