When did the `dc' command first appear?

[Warren Toomey]

In article by Greg Lehey:
> > There's a binary of dc from either 1st or 2nd Edition in the PUPS Archive:
> > 	-r---wxrw- 0/0            6846 Apr 14 06:50 1973 bin/dc
> 
> Wouldn't that be the Third Edition with that timestamp?  I won't
> comment again about the permissions.
> Greg

The binary is an 0405 a.out file. I'm told by Norman Wilson, who has
paper copies of the 2nd & 3rd Edition manuals, that 0405 binaries didn't
exist in 2nd & 3rd Edition.

I also believe that the files in the s2.tar tarball sent in by Dennis
are a whole year off, and so the date above should be Apr 14, 1972.
That dates the file just before the release of 2nd Edition.

I really need to sit down & outline my reasons for believing that the
dates are a year out. I'll do so soon & email it here!

Cheers all,
	Warren

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