This session will be focused on user management in Drupal:
¿Qué es Drupal?
Drupal is a free and open source modular framework and Content Management System (CMS) written in PHP. It is used as a "back end" system for many different types of websites, ranging from small personal blogs to large corporate and political sites. (Source: Wikipedia)
For more information, click here to go to the presentation by Daniel Primo (under Creative Commons license).
Information about Drupal: Drupal.org