What are the 4 types of UI?

There are four types of user interface: command line, menu-driven, form-based, and graphical user interface (GUI).

1. Command line interface (CLI) is a text-based interface that is used to operate software. Users type commands into a CLI to run programs or perform tasks.

2. Menu-driven interface (MDI) is a type of user interface that uses menus to provide a list of options from which the user can choose.

3. Form-based interface (FUI) is a type of user interface that uses forms to collect information from users.

4. Graphical user interface (GUI) is a type of user interface that uses visual elements like windows, icons, and drop-down menus to support user interaction.