more-16.md

---

layout: "lesson"
lang: "en"
title: "More on: Accessing documentation and getting help"
description: "This lesson show you where you can find the sources of LaTeX itself."
toc-anchor-text: "More on: Accessing documentation and getting help"

---

Documented sources of LaTeX

The texdoc command described earlier is not restricted to package documentation. If you wish to go beyond the areas covered by this course and study the LaTeX inplementation in detail then the following links may help.

The source of LaTeX itself is available as a LaTeX-typeset document source2e.pdf, available from texdoc source2e or at texdoc.org.

Current releases of LaTeX also have preloaded the LaTeX3 Programming Language code, previously available as the expl3 package. texdoc may be used to see the expl3 interface description (texdoc interface3) or full expl3 source code (texdoc source3).