GB/T 7513-1987

This standard specifies the arrangement of Chinese ideographs on full-character keyboards, defining the layout of characters on the key surface for direct input. It is applied in the design and manufacturing of Chinese character input devices, particularly for specialized keyboards used in professional typesetting, data entry, and early computer systems requiring direct character selection. The standard ensures consistency in key placement across different hardware implementations, facilitating user training and interoperability in Chinese-language computing environments.