To update this thread:

The wording from my last edit to the Wikipedia article on cron is still there, although one of the references has been removed, and the phrase "better source needed" has been added. That part is OK with me, and I actually agree with it--a better source is needed.

But at least the article at this point no longer says that cron is an acronym.

[To Greg Lehey: As anyone can edit the article, you could could add a paragraph about bogus claims as to what cron means if you want, but, in my opinion, the article is better without this distracting discussion.]

On Fri, Dec 25, 2015 at 3:22 PM, Greg 'groggy' Lehey <grog@lemis.com> wrote:
On Friday, 25 December 2015 at 10:41:54 -0800, David wrote:
> It has been updated again:
>
>  The origin of the name cron is from the Greek word for time,
> ???????????? (chronos).[2][3] (Ken Thompson, author of cron, has
> confirmed this in a private communication with Brian Kernighan.)

Yes, but you've removed the reference to the incorrect expansions.  As
I noted at some length earlier in this thread, that's not appropriate.
It ignores the fact that people have made these claims, it removes the
comment that they're unsubstantiated, and it prepares the field for
somebody else to make the claim again, with possibly even more bizarre
expmanations.  I won't back it out yet, because I can see further
changes coming from other directions.  Once again this Tedickey
character has been very active.

Greg
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