What is BS 4058 – Data processing flow chart symbols, rules and conventions about? 
A data processing flow chart is a visual representation of the information flow through a process or system. A data processing flow chart help you better understand process or system operation to discover potential problems, improve efficiency, and develop better processes.
BS 4058 is a British standard that discusses the specification of symbols, rules and conventions used for data processing flow chart.
BS 4058 specifies symbols to be used in information processing documentation and gives guidance on the conventions for their use in:
- Data flowcharts
- Program flowcharts
- System flowcharts
- Program network charts
- System resources charts
Who is BS 4058 - Data processing flow chart symbols, rules and conventions for? 
BS 4058 on data processing flow chart symbols, rules and conventions is relevant to: 
- Companies involved with software engineering
- Software programmers and developers
- Technical documentation experts
- The telecommunication and information technology industry
- Regulatory bodies
- Local and national authorities
Why should you use BS 4058 - Data processing flow chart symbols, rules and conventions?
Charts are widely used to depict various types of information processing problems and their means of solution. BS 4058 is thus prepared for a wide range of applications.
In-house rules may have to be devised to suit the process or data specification being considered. However, there are guiding principles which, if followed BS 4058, will enhance readability and expedite cross-reference to the text.
Charts consist of symbols having a given signification, brief explanatory text, and connecting lines. Charts may be used at various levels of detail; the number of levels depending on the size and complexity of the information processing problem.
Thus, BS 4058 is your guide on adopting best industry flow chart symbols, rules and conventions for data processing operations for better understanding of the functioning and the limits of a system. You can also use this guidance to plan out a new system for implementation.
