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Why can't they just call it input or output?

This is more of a historical question I think than a programming question.

user2926999
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2 Answers2

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Read this document The ins and outs of standard input/output

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Because you can change how a program's IO behaves, e.g. reading bytes over a network or writing to a file. STDIN and STDOUT (and STDERR) are the defaults. Or, if you will, the standards.

joews
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