When did the `dc' command first appear?

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Brian Chase asked:

> 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?

I see it on the System III and Version 7 systems.   I don't see it in V6 distro 
however.

Cheers,
		-skots
--
Scott G. Akmentins-Taylor     InterNet: staylor at mrynet.com
MRY Systems			        staylor at mrynet.lv
    (Skots Gregorijs Akmentins-Teilors -- just call me "Skots")
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