Preface: Why Drupal?
Drupal is a great content management system, a powerful framework for web applications, and a cutting edge social publishing platform. Above all, Drupal is more than software—it is a vibrant community of developers, designers, project managers, business innovators, technology strategists, user experience professionals, standards and accessibility advocates, and people who just mess around with stuff until they figure it out.
Figure 1. Drupal as the intersection of web content management system, application framework, and social and semantic publishing platform—encompassed by a diverse community