FIELD: concluding transactions between many buyers and sellers. SUBSTANCE: system is safe limited-access network used as part of large public switched packet network and enables access to information station for registered buyers and sellers only. Interactive database includes real- time information concerning particular sales operation. Buyer requests data on desired product and this request disables request of any other buyers who wanted to choose this very product. EFFECT: enlarged functional capabilities. 17 cl, 12 dwg
