GPL/I(ID:7050/gpl008)

for Graphical PL/1
Related languages
PL/I => GPL/I   Extension of
References:
  • Smith, D. N. "GPL/I-A PL/I extension for computer graphics" pp511-528 view details
          in [AFIPS] Proceedings of the 1971 Spring Joint Computer Conference SJCC 38 view details