A display system includes a display panel that displays information and a movement apparatus that moves the display panel. The system and method utilizes a computer program that identifies, locates, secures, andor removes from computers, computer systems andor computer networks personally identifying andor other sensitive information in different data formats. Further proposes the overlay model of the grinding frequency of \u201cLeast Pixel Number \u201d, \u201cCross-section Check CSC\u201d, \u201cStraight Line-Path Effective polishing Factor \u201d and \u201cScale Factor ,\u201d so as to develop the procedures of analyzing the distribution condition of effective grinding frequency on the surface of the chips. The server transmits printing data converted from the content and causes the printer to print the content. The separation of the catalyst solution from the crude product is simple, thereby realizing the regeneration and recycling of the catalyst. In one aspect, the method comprises encrypting the data item using a key derived from the content of the data item, determining a digital fingerprint of the data item, and storing the data item on the storage device at a location or locations associated with the digital fingerprint.