Abstract: An electronic diary stores information for a schedule of a user, information of a business card binder, a telephone director and an address book into a schedule supervision table, a telephone number supervision table, an address supervision table and a business card supervision table. When the user specifies an item in the schedule as a destination, for example a visiting company, the electronic diary retrieves the address or the telephone number of the visiting company and transmits them as destination data to a navigation apparatus. The navigation apparatus sets up the destination based on the received destination data.