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1 definition found
 for Sketchpad
From The Free On-line Dictionary of Computing (30 December 2018) :

  Sketchpad
  
     A program that allowed users to draw on a screen with a light
     pen.  It supported constraints (e.g. drawing a constrained
     ellipse produced a circle).  It also had some computer aided
     design features (e.g. computing loads on beams).
  
     Sketchpad was the subject of Ivan E. Sutherland's 1963 MIT
     PhD thesis, which opened the field of computer graphics.  It
     was the progenitor of computer drawing packages like MacDraw
     or Adobe Illustrator.  There is a film of Sketchpad in
     action.
  
     It solved constraints using value inference and introduced
     the "{ring" list structure.
  
     ["Sketchpad: A Man-Machine Graphical Communication System",
     I.e. Sutherland, MIT Lincoln Lab, TR 296 (Jan 1963)].
  
     [Sammet 1969, p. 678].
  
     (1995-02-14)
  

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