Information control techniques capable of storing information from information providers distributedly and arbitrarily collecting information related to a desired subject. An information processor being in cooperation with other information processors connected with a network, comprising an operating unit for preparing information related to a desired subject, recording units for recording the information, a communication unit for communicating with other information processors connected with a network, and a control unit, the control unit, on receiving a subject-specified inquiry from other first information processor, retrieves information matching the inquiry in the recording units and sends back the matched information to a specified receiving party.