Texinfo is the format of the official documentation of the GNU Project. Texinfo is the format of the official documentation of the GNU Project. It was invented by Richard Stallman and Bob Chassell it many years ago, loosely based on Brian Reid's Scribe and other formatting languages of the time. Texinfo project is used by many GNU projects as well.Texinfo uses a single source file to produce output in a number of formats, both online and printed (DVI, info, html, pdf, xml, etc.). This means instead of writing different documents for online information and another for a printed manual, you must write a single document. And when the work is revised, you need to revise that one document. The Texinfo system is well integrated with GNU Emacs.