What do you think what is flowchart?
Our electronic definitions web site has answer for that as well:
is a graphical representation of the operations involved in a data processing
system. Symbols are used to represent particular operations or data and flow
lines indicate the sequence of operations or the flow of data.
1 Data flowchart
is a flowchart used to describe a complete data processing system the clerical
operations involved down to the level of individual programs but excluding
details of such programs. Also called a System flowchart.
3.2 Program flowchart
is a flowchart used to describe the sequence of operations within a computer
program and forms part of the permanent record of a finished program for
maintenance purposes. (See example on page 22.)
4 ECMA (European Computing Manufacturers Association) symbols
are standard symbols used in system and program flowcharts.