The Free On-line Dictionary of Computing (30 December 2018):

Class Oriented Ring Associated Language

    (CORAL) A language developed by L.G. Roberts at
   MIT in 1964 for graphical display and systems programming on
   the TX-2.  It used "rings" (circular lists) from
   Sketchpad.

   ["Graphical Communication and Control Languages",
   L.B. Roberts, Information System Sciences: Proc Second
   Congress, 1965].

   [Sammet 1969, p.462].

   (1994-11-30)