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-<head>
-<title>UK TeX FAQ -- question label underscore</title>
-</head><body>
-<h3>How to use the underscore character</h3>
-<p/>The underscore character &#8216;<code>_</code>&#8217; is ordinarily used in
-TeX to indicate a subscript in maths mode; if you type
-<code>_</code>, on its own, in the course of ordinary text, TeX will
-complain. If you&#8217;re writing a document which will contain a large
-number of underscore characters, the prospect of typing
-<code>\</code><code>_</code> (or, worse, <code>\</code><code>textunderscore</code>) for every one of
-them will daunt most ordinary people.
-<p/>Moderately skilled macro programmers can readily generate a quick hack
-to permit typing &#8216;<code>_</code>&#8217; to mean &#8216;text underscore&#8217;.
-However, the code <em>is</em> somewhat tricky, and more importantly
-there are significant points where it&#8217;s easy to get it wrong. There
-is therefore a package <i>underscore</i> which provides a general
-solution to this requirement.
-<p/>There is a problem, though: OT1 text fonts don&#8217;t contain an
-underscore character, unless they&#8217;re in the typewriter version of the
-encoding (used by fixed-width fonts such as <code>cmtt</code>). So either
-you must ensure that your underscore characters only occur in text set
-in a typewriter font, or you must use a more modern encoding, such as
-T1, which has the same layout for every font, and thus an
-underscore in every font.
-<p/>If the requirement is only for occasional uses of underscores, it may
-be acceptable to use the following construct:
-<blockquote>
-<pre>
-\def\us{\char`\_}
-...
-\texttt{create\us process}
-</pre>
-</blockquote><p>
-The construction isn&#8217;t in the least robust (in the normal English
-sense of the word), but it <em>is</em> robust under expansion (i.e., the
-LaTeX sense of the word); so use it with care, but don&#8217;t worry
-about section headings and the like.
-<dl>
-<dt><tt><i>underscore.sty</i></tt><dd><a href="http://mirror.ctan.org/macros/latex/contrib/underscore.zip">macros/latex/contrib/underscore</a> (or <a href="http://mirror.ctan.org/macros/latex/contrib/underscore/">browse the directory</a>); <a href="http://mirror.ctan.org/help/Catalogue/entries/underscore.html">catalogue entry</a>
-</dl>
-<p/><p>This question on the Web: <a href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=underscore">http://www.tex.ac.uk/cgi-bin/texfaq2html?label=underscore</a>
-</body>