How is this classification of PHP products?

At a place, I saw classification like this

Wordpress

Symfony

Drupal

Framework:
CakePHP ,
Code Igniter ,
eZ Components ,
PEAR,
Smarty ,
Symphony ,
Zend Framework.

Apps:
Drupal ,
Joomla ,
Mambo ,
osCommerce ,
Wordpress.

Now just I will take one - Drupal. Don't we say Drupal a framework? Even drupal site write itself as framework. I am not getting the classification of these product. On what line this is classified. Can you solve the puzzle!

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  • # 2 - by benivolent

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