Full-screen Input/Output

     (user interface) A style of operation of the keyboard and display used
     for complex data entry and display tasks.  Full-screen input and output
     are generally performed using the @..SAY, @..GET and READ commands.
     Full-screen output is distinguished from console-style output by the
     fact that control characters (e.g., backspace, carriage return) are not
     processed, and wrapping and scrolling do not occur at the boundaries of
     the visible display area.