1. Overview of Texinfo

Texinfo(1) is a documentation system that uses a single source file to produce both online information and printed output. This means that instead of writing two different documents, one for the online information and the other for a printed work, you need write only one document. Therefore, when the work is revised, you need revise only that one document.

Manuals for most GNU packages are written in Texinfo, and available online at http://www.gnu.org/doc.