List the key components of Angular 2 ?

The Angular 2 comprises of the following key components:

• Module – This is used to break the application into the logical pieces of the program code and each piece of code or module is designed to perform a single and unique task.
• Component – This is used to bring the modules together.
• Templates – This is used to define the Views of an Angular JS application.
• Metadata – This is used to add more data to an Angular JS application.
• Service – This component is used to develop the components, which can be used to share in the entire application.