Level 1 data-flow diagrams

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What are the difference between level 0, level 1 and level 2 Data flow diagrams? - Quora

What is Data Flow Diagram (DFD)? How to Draw DFD?

What is a Data Flow Diagram (DFD)?

What are the difference between level 0, level 1 and level 2 Data flow diagrams? - Quora

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Data Flow Diagram (DFD)

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