The Basic Integrated Computer Work Station
interconnection, switching, and control, and
The above are the three essential elements of any device which does useful work and qualifies as a computer. Input may be by any of several means, as may output, but in today’s computers basic input is usually by keyboard, although supplemented often by disks and/or tapes, and output is usually by cathode ray tube (CRT) screen display, although often supplemented by printers (“hard copy” output) and/or other output devices.
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