Flowchart symbols, terminology and procedures were designed for use and compatibility with existing ANSI standards for flowchart information processing. These standards are defined in American National Standard for Flowchart Symbols and Their Usage in Information Processing, ANSI X3.5-1970.
ANSI/AIIM MS4-1987 specifies symbols for microfilm operations and symbolic language for labeling these symbols in order to delineate specific operations, functions and features.
This standard presents guidelines and recommendations for flowchart management systems (level 1) and operational systems (level 2). The annotations covered in this standard are those generally required for detailing to second level flowcharts. It is not practical to include all possible annotations that may be necessary for greater detail.