<h2>My favorite technology:</h2>
<ol>
<li><strong>Programming languages:</strong></li>
</ol>
<ul>
<li>Python</li>
<li>C</li>
</ul>
<ol start="2">
<li><strong>Environments:</strong></li>
</ol>
<ul>
<li>Unix</li>
<li>Linux</li>
</ul>
<ol start="3">
<li><strong>Tools:</strong></li>
</ol>
<ul>
<li>Vim</li>
<li>tmux</li>
<li>latex</li>
</ul>

Andrey Portnoy