Is a word star is GUI or TUI?

WordStar is a text-based program (TUI) that uses a character-based user interface.

Here's why:

* No graphical elements: WordStar does not use any icons, buttons, or graphical elements for user interaction.

* Command-driven: It relies on keyboard commands and menus displayed as text.

* Limited cursor movement: It relies on cursor keys for navigating text, unlike modern word processors with mouse-driven cursors.

While WordStar might have some limited visual formatting capabilities, its core interface is text-based, making it a TUI application.