Abstract: One or a plurality of commodities are placed in a commodity exhibition shelf (8). Information peculiar to any commodity is read using an input device (2) under the control of a control device (1). It is checked from the information whether any condition, for example, a discount should be given or the like, is stored with respect to the commodity in an information storage device (4). If a condition is stored, then the condition is displayed on a display device (3).

Abstract: A system provides a user with proper information about a target exhibition object among many exhibition objects in exhibition facilities according to a user's request. The system has a database system for storing information about exhibition objects, a host computer, and at least one terminal. The host computer has a host transmitter/receiver unit and retrieves information from the database system according to the identification code of a given exhibition object. Each of the exhibition objects has a communication unit that returns an identification code in response to a request signal. The terminal has a terminal transmitter/receiver unit for communicating with the host computer, an operation switch for generating the request signal according to a user's operation, an object communication unit for transmitting the request signal to a target exhibition object and receiving an identification code therefrom, an information output unit for providing the user with information about the target, and a control unit.

Abstract: A microwave oven and a cash register system of a store in which an employee of a store, who is requested to operate the microwave oven, can run the store efficiently while reducing the waiting time for shoppers and suppressing losses deriving from incorrect operation of the microwave oven. The microwave oven includes an irradiator for irradiating microwaves to heat articles, an article information reader for reading article information from an article information recording medium arranged on the surface of the article, and a heating control unit for controlling the irradiator to operate at a condition determined based on the article information read by the article information reader.