ably want.  At
the end of this document, we'll refer you on to resources that can
help you pursue these topics further.</p>
</div>
<div class="section" id="preliminaries">
<h1>Preliminaries</h1>
<p>We use one typographic convention that might not be immediately
obvious: <em>italic</em> text in examples is meant as a descriptive
placeholder for something else, usually information that you'll
provide.  For example:</p>
<pre class="literal-block">
<strong>$</strong> echo &quot;My name is <em>your name</em>&quo