Fibre optic, , Cathode Ray Tube, , Binary Digits, , Router, , Laser Printer, , Sensor, , Barcode Reader, , Direct Input Device, , Analog Data, , Network, , Universal Serial Bus, , Error Checking, , Barcode, , System Buses and Memory, , Embedded System, , Input/Output Device, , QR Code, , Output device, , Random Access Memory, , Hard Disk, , Optical Media, , Algorithm, .

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