FIELD: computer systems for controlling data including at least those concerning warrant trade. SUBSTANCE: computer system has data processing subsystem, input unit, display unit, and data input; display unit displays first mask whose format enables input of request related to specific data by means of input unit; data input is read out in case request is entered by means of input unit; display unit displays second mask incorporating requested data and data processing subsystem holds requested data within preset time Tset and executes operation concerning specific data provided operation request has been entered by means of input unit within preset time Tset. EFFECT: enhanced precision of data processing and enhanced operating reliability of system. 27 cl, 18 dwg
