event in a graphical user interface (GUI) application
Action (or interaction) are the actions that can perform a user (or programmatic client) with the application.
The more action, the more engagement.
- keyboard actions,
- mouse actions,
- and scroll actions
- time to interactive: the time that the rendering of a UI component will take before it's ready to interact with the user.
- UML - Interation Diagram such as
An Event Handler processes the ui action