42 Design and development of computer hardware, computer software, printer programs, printer servers, printers, digital printers, computer peripherals, printers for computers, printer displays, printer hubs, computer software, printer programs, printer servers, printer switches, printer controlling apparatus, printer converters, printing task management devices, electronic card readers, electronic card readers for wireless reading of a card, USB (universal serial bus) card readers; Integration services of computer systems and networks; installation, maintenance and repair of computer software, printer programs