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Specifies a set of functions for computer graphics programming, i.e. the Graphical Kernel System for Three Dimensions (GKS-3D) as the basic graphics system of computer-generated three dimensional pictures on graphics output devices. Provides application programs to define and display 3D graphical primitives, specified using 3D coordinates. Functions are provided to for storage on and retrieval from an external graphics file with the functions being organized in upward compatible levels with increasing capabilities. Additional functions are defined to generate output primitives.