A diagram is a simplified and structured visual representation of concepts, ideas, constructions, relations, statistical data, anatomy etc used in all aspects of human activities to visualize and clarify the topic.

Basic diagram types:

• Tree diagram
• Graph
• Matrix
• Network
• Flow
• Set
• Dependency diagram

Specific types:

• Bachman
• Booch OOD
• Cause and Effect diagram
• Chen ERD
• Condition
• COM and OLE
• Cross-functional flowchart
• Database Model Diagram
• Data Flow Model diagram
• Design Structure Diagram
• Express-G
• Fusion diagram
• Gantt chart
• Hasse diagram
• Hierarchy diagram
• Histogram
• IDEF0
• IDEF1 (entity relations)
• Ishikawa diagram
• Jackson diagram
• Jacobson Use Cases
• Johnston diagram
• Organisation
• Line of balance
• Martin ERD
• Mind map
• Nassi Scheidermann
• Nomogram
• ORM Diagram
• PERT
• Petri net
• Process
• Program Structure diagram
• Rich Picture
• SDL diagram
• Shaeler-Mellor
• SSADM
• System Structure
• Systematic layout planning
• TQM diagram
• UML Model diagram
• Value stream mapping
• Venn diagram
• Yourdon and Coad

See also

• Diagramming
• DatadiagramML