Abstract: A balance diagnostic apparatus and system is given a portable size and weight and also expands the places of use and methods of use to a large range, thus achieving an environment where anyone can undergo diagnosis of balance disorders at any time or any place. At least motion sensor means 10 and motion storage means 18 that temporarily stores signals that represent motion from the motion sensor means 10 are worn on the body of the user. Moreover, once the motion situation is stored in the motion storage means 18, the input of the motion diagnosis means 12 is connected to the output of the motion storage means 18 to obtain the output of diagnostic results with this balance function diagnostic system.

Abstract: In a commodity data management apparatus, a communication unit receives purchase commodity data of each customer in time series from a commodity data input and output apparatus. A data analysis unit determines a tendency of purchase commodity of each customer according to the purchase commodity data received. The communication unit sends commodity presentation data based on the tendency of purchase commodity to the commodity data input and output apparatus of the customer. The commodity presentation data is usable for the customer's next purchase. In the commodity data input and output apparatus, a communication unit receives the commodity presentation data, and a display unit displays the commodity presentation data to the customer.