Abstract: Log information concerning an electronic transaction performed between a transaction device and a business connection server through a network is compared with information concerning a predetermined business connection down-loaded from the server, and the log information is recorded in an IC card accepted by the transaction device when the log information is related to the information concerning a predetermined business connection. Predetermined commodity information is provided to a user in accordance with a request by the user of the IC card when the log information stored in the IC card satisfies a predetermined condition.

Abstract: A digital contents area displayed on a terminal is detected, and an area to be charged is calculated according to the detected area. A criterion for determining that a user reads the digital contents is a time during which the area of the contents is displayed. If the time is equal to or longer than a predetermined time, the displayed contents area is determined to be an area to be charged. There are two methods, a page-change button method and a scroll method, as a method that measures a contents display time for determining whether an area is to be charged.

Abstract: Log information concerning an electronic transaction performed between a transaction device and a business connection server through a network is compared with information concerning a predetermined business connection down-loaded from the server, and the log information is recorded in an IC card accepted by the transaction device when the log information is related to the information concerning a predetermined business connection. Predetermined commodity information is provided to a user in accordance with a request by the user of the IC card when the log information stored in the IC card satisfies a predetermined condition.

Abstract: Log information concerning an electronic transaction performed between a transaction device and a business connection server through a network is compared with information concerning a predetermined business connection down-loaded from the server, and the log information is recorded in an IC card accepted by the transaction device when the log information is related to the information concerning a predetermined business connection. Predetermined commodity information is provided to a user in accordance with a request by the user of the IC card when the log information stored in the IC card satisfies a predetermined condition.