1. An information processing device comprising; a display unit for outputting in a displayed form a plurality of data blocks respectively having a coordinate value on the display screen; a detector for detecting coordinate values of a plurality of points designated by the user on the display screen, and changes in the coordinate values caused by moving operation of a plurality of the points; and an information processing unit for specifying a data block as a target for the information processing from a plurality of the data blocks based on the coordinate values of a plurality of the points, and executes a predetermined processing for the specified data block.