<h3 id="cpan"><a href="cpan/">Using CPAN with Perl</a></h3>
+CPAN is the Comprehensive Perl Archive Network, which contains a wealth
+of open-source and reusable source code, that can be used in your applications.
+Follow the link to learn how to effectively use CPAN.
<h3 id="debug"><a href="debugging/">Debugging Perl Programs</h3>
+When bugs occur, learn how to find their cause and correct them effectively.
<h3 id="oop"><a href="object-oriented/">Object-Oriented Programming (OOP) in Perl</h3>
+Learn about how to write classes, objects, and other concepts of
+Object-Oriented Programming in Perl.