Apparatus controlled by computers, including, displays, printers and x-y plotters; plotter printers; cutting plotters for use as sign makers; combination ink jet printer and cutter; combination thermal printer and cutter; computer printers; printers; x-y plotters; scanners; three dimensional scanners; computer programs for controlling cutting, drilling, grinding and engraving machines, power operated computerized machine cutters, drillers and grinders, engraving machines, laser engraving machines, three dimensional modeling machines, plotter printers, cutting plotters for use as sign makers, printing and cutting machines, computer printers, x-y plotters and three dimensional scanners; and replacement parts for the abovementioned goods