UDC681.3:003.621.63L73GB中华人民共和国国家标准GB1526-89IS05807-1985信息处理一数据流程图、程序流程图、系统流程图、程序网络图和系统资源图的文件编制符号及约定Information processing-Documentation symbols andconventions for data,program and sys tem flowcharts,program network charts and sys tem resources charts1989-07-04发布1990-01-01实施国家技术监督局发布
