On Thu, Dec 2, 2021, 8:08 AM Vincent Breton <emacs-orgmode@presentiel.fr> wrote:
Hi,


Emacs and Emacs Org documentation, and lot of others GNU products use
Texinfo to generate their own  documentation to different formats.

The Org mode documentation switched to Org format few years back: https://git.savannah.gnu.org/cgit/emacs/org-mode.git/tree/doc/org-manual.org

Yes, originally, it was in Texinfo.