CMS for demanding businesses
The vision for Drupal is that with standards and open source build a system where individuals and groups that are geographically dispersed can collectively produce, discuss and share information. With a focus on community and cooperation with the modular approach Drupal becomes an effective platform for both the website and intranet.
Drupal is modular in design. This means that if for example you need to do newsletter mailings or have a community there are often ready-made modules to connect. Since Drupal has many users new modules are produced all the time and there is a good chance that there is something that suits your needs.