device control

Computing Dictionary

Device Control definition

character
One of the four ASCII characters, DC1, DC2, DC3, and DC4, once used to remotely control equipment (e.g. a paper tape reader) via electromagnetic switches. The characters were usually paired, DC1/DC3 turning one device on/off, and DC2/DC4 another.
[Other examples of equipment?]
(1996-08-20)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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