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Rc is a programming language created in 1989 by Tom Duff.

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rc (for "run commands") is the command line interpreter for Version 10 Unix and Plan 9 from Bell Labs operating systems. It resembles the Bourne shell, but its syntax is somewhat simpler. It was created by Tom Duff, who is better known for an unusual C programming language construct ("Duff's device"). Read more on Wikipedia...

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Example from Wikipedia:
a |[2] b # pipe only standard error of a to b — in Bourne shell as a 3>&2 2>&1 >&3 | b a <>b # opens b as a's standard input and standard output a <{b} <{c} # becomes a {standard output of b} {standard output of c}

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