A Character-based User Interface is a user interface that features full-screen cursor manipulations to emulate forms, etc.
The abbreviation TUI (text-based user interface) is sometimes used to describe the same thing.
curses is perhaps the most widely-known CUI.
Another is provided with S-Lang [L1 ].
Some implementaion menu and frames in Tcllib package ::term::ansi::code:macros [L2 ].
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