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

SuperPaint

    A pioneering graphics program and framebuffer
   computer system developed by Richard Shoup at Xerox PARC.
   Design started in 1972 and the system produced its first
   stable image in April 1973.  SuperPaint was one of the first
   computers used for creative work, video editing and animation,
   all which would become major sections within the entertainment
   industry and major components of industrial design.

   SuperPaint had a graphical user interface and could capture
   images from video input or combine them with digital data.
   SuperPaint was the first program with features such as
   changing hue, saturation and value, a colour palette,
   custom polygons and lines, virtual paintbrushes and pencils,
   auto-filling of images and anti-aliasing.

   Richard Shoup's website
   (http://www.rgshoup.com/prof/SuperPaint/).

   (2008-11-27)