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Data Flow Diagrams (DFD) visualize data flows in information systems.
They show: what kinds of data input to and output from the system; where the data come from and go to; where the data is stored.
DFDs are used for design and analysis of business and engineering information systems.
They are also used for data processing visualization.
DFD template
DFD template, process, external interactor, entity,
Used Solutions

Draw Network Diagram based on Templates and Examples

Network diagram template - Common network topologies
ConceptDraw is rapid and powerful network diagram drawing software with rich examples, templates, design objects and stencils.

Business Process Modeling Notation Template

Collaborative (public) B2B process diagram BPMN 2.0 - Cab booking process
Create business process diagrams (BPMN 2.0.) with ConceptDraw using professional looking templates and business process improvement tools.