The CCK module is another must have Drupal module. It is used to create fields within your content page for specific content to be displayed within the node, or other nodes. It also interacts with many other modules and is one of the building blocks of a solid Drupal website. There are many sub-modules for the Content Construction Kit, and unfortunately, they are all separate modules.

Part of CCK is moving into Drupal 7 core and is known as Fields in Core.