取消并替换第一版（1985年）。指定一组用于计算机图形编程的函数，即图形内核系统。提供二维图形输出、图片存储和动态修改以及操作员输入的功能。适用于在矢量或光栅图形设备上以单色或彩色生成二维图片的广泛应用。

Cancels and replaces the first edition (1985). Specifies a set of functions for computer graphics programming, the graphical kernel system. Provides functions for two dimensional graphical output, the storage and dynamic modification of pictures, and operator input. Applicabe to a wide range of applications that produce two dimensional pictures on vector or raster graphical devices in monochrome or colour.