[CentOS] Bourne shell deprecated?

[JJB]

On 04/27/16 15:18, Chris Adams wrote:
> Once upon a time, JJB <jack at internetguy.net> said:
>> Interesting.  Back in 1980 we called /bin/sh the Mashey shell.  It
>> did not have command substitution or other things we now take for
>> granted.  Bourne did that for us.  So there's a version or two
>> missing in history...
> Check the history here:
>
> https://github.com/dspinellis/unix-history-repo
>

This history might be that of a particular lineage.  CB UNIX and PWB 
UNIX existed in the gap between 1975 and 1979.

https://en.wikipedia.org/wiki/CB_UNIX

Jack