Modules (Plugins, Addons)


A set of codes (libraries) that fits into a framework to handle a particular task. It cannot perform the task by itself.

If a module is so important and widely used, eventually it will be included as a part of the framework.

Typical web application modules’ tasks are:

  • User authentication (login, signup, restricted content).
  • Connection to other software like databases and web servers.
  • URL parser.


  • ¬†Apps of a mobile phone. You can download them to enhance your phone’s experience. Many widely used apps (eg. Photos) now come pre-installed.

Common Examples:

  • Too many of them. They are often stored in repositories and managed by frameworks’ module managers.