When did the `dc' command first appear?

[Eric Fischer]

Brian D. Chase writes,

> Just a quick question.  Was the `dc' command introduced with one of the
> BSD releases or did it exist in an earlier version of Unix like the 6th or
> 7th Edition?

It appears in the First Edition manual, and according to A Quarter
Century of Unix, it's even older than that.  "There was also a version
of dc, desk calculator, a very very early program.  That was actually
the first program that ran on the PDP-11.  It ran standalone before
there was an operating system." (p. 35)

eric

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