Info on BRL shell

[Dave Hammond]

I have seen an increasing number of references to the BRL shell (brl-sh)
when lists of standard shells are bandied about.  Since Doug Gwyn has
mentioned it more than once, I assume that the BRL standards for
Ballistic Research Lab and that brl-sh is their /bin/sh with extensions.
My questions are 1) is brl-sh local to BRL, commercially available, or
public domain and 2) is it a complete shell program or just extensions
which require the site have source to /bin/sh (ala tcsh).

Dave Hammond
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