As far as I know IEEE is not really a standard, it is a recommendation,
while ANSI is a standard. ANSI is the American standard and ISO is
International.

-- 
Ori Idan CEO Helicon Books
http://www.heliconbooks.com





On Wed, Jun 26, 2024 at 8:56 PM segaloco via TUHS <tuhs@tuhs.org> wrote:

> Good morning, I was wondering if anyone has the scoop on the rationale
> behind the selection of standards bodies for the publication of UNIX and
> UNIX-adjacent standards.  C was published via the ANSI route as X3.159,
> whereas POSIX was instead published by the IEEE route as 1003.1.  Was there
> every any consideration of C through IEEE or POSIX through ANSI instead?
> Is there an appreciable difference suggested by the difference in
> publishers?  In any case, both saw subsequent adoption by ISO/IEC, so the
> track to an international standard seems to lead to the same organizations.
>
> - Matt G.
>