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Customer self service electronic checkout station for point of sale transactions; Electronic point of sale communications systems comprised of computer hardware and software for the transmission of point of sale data between two points; Electronic equipment for point of sales systems, namely, point of sale terminals, optical readers, point of sale advertisement display monitors, point of sale keyboards, printers, scanners, radio transmitters, radio receivers, computer hardware, and computer operating software; Point of sale terminals; Wireless point of service devices