<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html>

<head>
    <meta http-equiv="Content-type" content="text/html; charset=iso-8859-1">
    <title>Special characters</title>
</head>

<body>

<p>
&lt;
&nbsp;
&gt;
&amp; <!-- note: & must be escaped even within hyperlinks -->
<br />
&bull;
&trade;
&copy;
&quot; <!-- note: " does not need to be escpaed -->
&#64;  <!-- note: @ does not need to be escpaed -->
<br />
&reg;
&Pi;   <!-- case sensitive -->
&pi;   <!-- case sensitive -->
&eta;
</p>

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</body>
</html>