Abstract: A navigation device includes: a degradation coefficient determination unit that determines a degradation coefficient representing a degradation level of a battery that supplies a vehicle with electric power; a current location calculation unit that calculates a current location of the vehicle; a vicinity map display unit that displays a vicinity map of the current location of the vehicle on a display screen; a cruising range calculation unit that calculates a first cruising range of the vehicle based on a remaining amount of the battery and a full charge amount of the battery contained in charging information received from the battery; a second cruising range calculation unit that calculates a second cruising range, which is smaller than the first cruising range, based on the degradation coefficient and the first cruising range; and a cruising range display unit that performs a display representing the second cruising range on the vicinity map.

Abstract: Reservation system realizing more efficient reservation of charging. The reservation system comprises a navigation device and a battery charger. The navigation device generates reservation information of a charge, and sends the reservation information to the battery charger. The battery charger makes a schedule by using the reservation information, and performs charging according to the schedule. Further, the battery charger makes again a schedule according to an arrival time of a booked vehicle.

Abstract: A navigation device includes: a degradation coefficient determination unit that determines a degradation coefficient representing a degradation level of a battery that supplies a vehicle with electric power; a current location calculation unit that calculates a current location of the vehicle; a vicinity map display unit that displays a vicinity map of the current location of the vehicle on a display screen; a cruising range calculation unit that calculates a first cruising range of the vehicle based on a remaining amount of the battery and a full charge amount of the battery contained in charging information received from the battery; a second cruising range calculation unit that calculates a second cruising range, which is smaller than the first cruising range, based on the degradation coefficient and the first cruising range; and a cruising range display unit that performs a display representing the second cruising range on the vicinity map.

Abstract: A digital broadcast reception system includes: a digital tuner unit including a broadcast wave decoder, for decompressing a compressed digital broadcast wave for moving pictures, and a video scale converter, for reducing an image size provided by the decoded broadcast wave; and a transmission interface unit to be connected to the PC, wherein digital broadcasting images are transmitted via the transmission interface unit to enable the viewing of a digital broadcast. Thus, a digital broadcast reception system appropriate for a small information processing system, such as a notebook PC can be provided.

Abstract: An expansion module has a standard interface, such as USB or a PC card, with its outward shape structured to allow the expansion module to be exclusively used with the drive unit of a recording medium. An information processing system includes a first ID recording unit in which the ID of the information processing system is recorded, a second ID recording unit in which a copy of the ID information in the first ID recording unit is recorded when the expansion module is initialized, an ID comparison unit that compares both ID information when the expansion module is used, and a module control unit that controls whether the expansion module is to be operated, wherein, if the ID information in the first ID recording unit matches the ID information in the second ID recording unit, the expansion module can be used.