A Graphical ServiceSystem With Variable Syntax
Man-machine interaction in many fields of endeavor
should be greatly facilitated in the near 
future through the use of interactive graphical languages.
 To provide a variety of display scope communication 
procedures, a Graphic Service system which functions
as a generalized graphical language translator, 
is being developed to aid the definition as
well as the use of new graphical languages.
CACM March, 1966
Roberts, L. G.
