{A \LaTeX\ reference manual} {Jim Hef{}feron} {The unofficial \LaTeX\ Reference Manual project (\url{http://home.gna.org/latexrefman}) aims to provide a Free document that summarizes the features of core \LaTeXe. The idea is to be a reference manual, not an introduction and not a book. The information it contains is available from other \LaTeX\ sources and documentation, but is scattered. This work brings it together. \code{latexrefman} is written in Texinfo, so output comes in a variety of forms, including \HTML\ and \PDF. The focus is on content rather than formatting. The manual has been included in free \TeX\ distributions for many years, under the package name \code{latex2e-help-texinfo} (for historical reasons). The document originated with George Greenwade, was (incompletely) updated for \LaTeX\ 2.09 by Stephen Gilmore, and (incompletely) for \LaTeXe\ by Torsten Martinsen. Since 2008, it has been maintained by Karl Berry, joined recently by Vincent Bela\"{\i}che and, independently, me. The manual is being actively maintained, and \LaTeX\ users should be aware of it as an available resource. In addition, I hope that people will consider contributing\Dash a person who is knowledgable but perhaps not expert can accomplish good things here, in a step-by-step way. That includes working on translations\Dash it is available in French (thanks to Vincent), and Spanish (thanks to a previous volunteer, Nacho Pacheco); the Spanish needs a new maintainer.}