There is provided an electronic device capable of automatically unlocking a lock of an external storage device using a password without adding a function to the external storage device. Transform coding is applied to the audio signal to generate a sequence of transform frequency coefficients. A communication session is automatically established with one of the switches as specified by a user through one of the selectable areas or the search function. In this state, both ends of the half bearing 11 in the axial direction thereof are cut along one cylindrical surface by use of a broach 19. A latch mechanism embodiment may lock the safety cover in the closed position preventing access even with uniform force. A plurality of memory cells is formed in the memory cell section, while a plurality of periphery circuitry transistors are formed also in the periphery circuitry section.