Though a symbol flowchart is similar to a business's organizational chart ... so a flowchart has special symbols to indicate input and output. You can use a parallelogram as a catch-all shape ...

Flow charts can be used to document virtually any type of business system ... all the procedures needed to convert the input into its final output form. Specialized flow chart symbols show ...

However, the simple flow chart of Input, process, and output are still used to visualise how the system performs. With mechanical control systems the input is supplied by movement, this is known ...