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Flowchart SymbolsFlowcharts use special shapes to represent differenttypes of actions or steps in a process. Lines and arrowsshow the sequence of the steps, and the relationshipsamong them. These are known as flowchart symbols.The type of diagram dictates the flowchart symbols thatare used. For example, a data flow diagram may containan Input/Output Symbol (also known as an I/O Symbol),but you wouldn't expect to see it in most process flowdiagrams.Over the years, as technology has evolved, so hasflowcharting. Some flowchart symbols that were used inthe past to represent computer punchcards, or punchedtape, have been relegated to the dustbin of history.More FlowchartSymbolsHere is a more comprehensivelibrary of flowchart symbols.Start/End SymbolThe terminator symbol marks thestarting or ending point of thesystem. It usually contains theword "Start" or "End."Action or Process SymbolA box can represent a single step("add two cups of flour"), or andentire sub-process ("make bread")within a larger process.