GB/T 1991-1980
AbolishedMethods for expression of the 7-bit encoding character set for information processing exchange on perforated paper tape
信息处理交换用七位编码字符集在穿孔纸带上的表示方法
Application Summary AI generated
This standard specifies the representation of the 7-bit coded character set (ASCII-based) on perforated paper tape, defining the hole patterns for each character to ensure consistent encoding during data storage and transmission. It was applied in early information processing systems, such as teletypewriters and computer input devices, where data was punched onto paper tape for exchange between machines. The standard is now largely obsolete, replaced by digital storage media, but remains relevant for historical data recovery or legacy system maintenance.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.