<html>
<body>
<p>The planets:</p>
<ol>
<li>Mercury</li>
<li>Venus</li>
<li>Earth</li>
<li>Mars</li>
<li>Jupiter</li>
<li>Saturn</li>
<li>Uranus</li>
<li>Neptune</li>
<li><del>Pluto</del></li>
</ol>
</body>
</html>
The ol element represents an ordered list.
A live example:
The planets:
N of