Abstract: The portable telephone of the present invention provides an environment in which recording/playing back of user's voice is made possible at each of the menu screens. Operations of a portable telephone can be smoothly performed by adding voice information to each menu screen. There are provided a memory device (4) for storing voice data, a microphone (1) and a speaker (7) for inputting/outputting voice, an encoder (2) and a decoder (6) for performing digital/analog conversion of voice, and a key operating portion (9) for achieving recording or playing back of voice by a first key operation and determining an input operation and executing recording or playing back of voice by a second key operation. Not only character information displayed on a display, but also guides or information by voice messages, can be obtained and, therefore, erroneous operations made by the user can be eliminated.

Abstract: A terminal device and a terminal system which are adapted for electronic money, excellent in operability and easy in the management of the electronic money. The terminal device used in combination with a host server has a function receiving a predetermined amount of electronic money from the host server when running start is instructed, a function of receiving the electronic money of the amount of payment from an IC card of a customer when a goods is bought, a function of transferring the electronic money to the host server so that when the internal balance of the electronic money exceeds an upper limit value of the balance, the balance of electronic money reaches a lower limit value of the balance, a function of transferring all the internal amount of electronic money to the host server, and other functions.

Abstract: A handsfree communication apparatus utilizing a plurality of microphones to allow simultaneous communication by a plurality of persons. The plurality of microphones are separately provided apart from one another. An amplifier section (or a noise canceller) includes a plurality of operational amplifiers for signal amplification individually corresponding to the plurality of microphones, and differential amplifier circuit for executing a differential amplification. Through the differential amplification, simultaneously input noise components are canceled out and reduced, and at the same time speech components are extracted.