1. Model-view-viewmodel (MVVM) is a design pattern used to enable two-way data binding between view and model so that one changes when the other does.
2. Angular is a very famous framework that conforms to MVVM design pattern, which allows highly responsive frontend applications that update efficiently when data from server changes or when a user interacts with the application. Apart from this, Angular provides routing, dependency injection, components, templates, and such to enable flexible, modular development.
3. Angular CLI is a tool to ease the development of Angular applications because it helps create new Angular projects, generate codes, and more.
4. Angular Material is a framework that can be used to ease layout design and to provide themes.
5. CORS is a mechanism that uses HTTP headers to inform the browser to allow a web application running on one origin to have permission to access resources from a different origin.
6. OAuth2 is an authorization contract that enables applications to be secured by providing limited access to user accounts available on an HTTP service.
7. Resource, Resource Owner, Resource Server, Authorization Server, Client.