Abstract: A mobile apparatus includes a main body; a wall forming part of an enclosure forming a sound space in the main body, the wall having an opening therein; a speaker disposed in the sound space; a signal line connected to the speaker and passing through the opening in the wall; and an opening sealing member that seals the opening in the wall through which the signal line passes.

Abstract: A computer system includes a touch pad having plural key areas and generating a key signal according to a touch input with respect to the respective key areas, a display, a storing unit for storing a relation table of the character value corresponding to the key area, and a controller reading the character value corresponding to the concerned key area from the storing unit and displaying the same on the display if a key signal is generated in the touch pad, and if the key signals are successively generated with respect to the plural key areas, sequentially converting and displaying the character values corresponding to the successive key areas.