Angular Front is a web development framework that is used to create dynamic, interactive user interfaces. It is based on the JavaScript programming language and is used to create single-page applications. It is an open-source framework and is maintained by Google. The term TRI refers to the three core components of Angular Front: Templates, Routing, and Interaction. Templates are used to define the structure of the application, Routing is used to define how the application will respond to user interactions, and Interaction is used to define how the application will interact with the user.