GKS was fairly common on computer workstations in the 1980s and early 1990s, and formed the basis of Digital Research's GSX and GEM products; the latter was common on the Atari ST and was occasionally seen on PCs particularly in conjunction with Ventura Publisher. It was little used outside these markets and is essentially obsolete today except insofar as it is the underlying API defining the Computer Graphics Metafile. A notable descendant of GKS was PHIGS.
GKS was ANSI standard ANSI X3.124 and ISO standard ISO/IEC 7942. The language bindings are ISO standard ISO 8651. GKS-3D (Graphical Kernel System for Three Dimensions) functional definition is ISO standard ISO 8805 and the C bindings are ISO 8806.
The functionality of GKS is wrapped up as a data model standard in ISO 10303-46.
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