Abstract: This product search server is provided with: a WEB server which communicates with an exhibition terminal and a product search terminal; a control unit which performs processes in response to a request such as product offering, search, order, etc.; a clock which holds and returns the current time; an product-offering DB which accumulates offered-product information, registration time, latitudes and longitudes of registration places, and contact information of registrants; and a mail server which transmits order notification. With this structure, the offered product of the entry is displayed only when the distance (unit: kilometer [km]) from the entry registration place to the search place is less than the square value of the elapsed time (unit: hour [H]) from the entry registration to the search, so that the searcher located at a shorter distance from the seller can acquire the right of order earlier.

Abstract: An information processing system according to the present invention comprises a plurality of measuring instruments; and a summary server connected to the plurality of measuring instruments via a network. Each of the measuring instruments comprises a detector measuring the amount of energy usage, and an instrument controller generating an individual data piece including information on the amount of energy usage or information on carbon dioxide emission. The summary server comprises a storage storing a reference amount of usage on each of individual data pieces, and a controller which, when the individual data piece is received from the measuring instrument, calculates the amount of carbon dioxide that has been reduced as a surplus value on the basis of both the amount of carbon dioxide emission or the amounts of emission of the received individual data pieces and the reference amounts of usage of the plurality of individual data pieces.