This document summarizes Wong Hoi Sing's presentation on commercial use of open source web content management systems. It discusses what open source software (OSS) and web content management systems (CMS) are, compares Drupal, WordPress and Joomla, and previews new features in Drupal 8 like mobile responsiveness and multilingual capabilities. It also lists online resources for learning more about CMS options and the Drupal community in Hong Kong.