Abstract: A mobile telephone has a display section for displaying a left screen in the left direction and a right screen in the right direction. Accordingly, a viewer holding the mobile telephone in hand can view the left screen when viewing the display section from the left side and the right screen when viewing the display section from the right side. Furthermore, the mobile telephone detects a change of the direction of the display section and switches the display screen. Consequently, when the viewer returns the holding state for viewing the right screen to the previous state and views the screen from the left side, he/she can view the next left screen.

Abstract: A mobile telephone has a display section for displaying a left screen in the left direction and a right screen in the right directions. Accordingly, a viewer holding the mobile telephone in hand can view the left screen when viewing the display section from the left side and the right screen when viewing the display section from the right side. Furthermore, the mobile telephone detects a change of the direction of the display section and switches the display screen. Consequently, when the viewer returns the holding state for viewing the right screen to the previous state and views the screen from the left side, he/she can view the next left screen.

Abstract: An object of the invention is to provide a communication apparatus for use with a public telephone network, capable of securely obtaining information from an information supplying terminal device. In the apparatus, a plurality of data (DTMF signals) to be transmitted to the information supplying terminal device; a standby time from the end of transmission of the data to the beginning of transmission of the subsequent data; and judgment data representing whether a voice signal from the information supplying terminal device exists after transmission of the data are stored. In the case where on the basis of the judgment data it is judged that a voice signal exists, the data D5 to be subsequently transmitted is transmitted, after the standby time means has been timed and the termination of transmission of a voice signal has been detected in a silent period.