Data flow diagrams are used to represent the flow of data in a system.

Entity-relationship diagrams are used to visualize the relationships between entities in a database.

The pressure volume diagrams show the changes in pressure and volume of a system.

Coxeter-Dynkin diagrams are used to represent finite reflection groups.

H-R diagrams are used to study the properties of stars.

Scientists use Hertzsprung-Russell diagrams to study the properties of stars.

Polar area diagrams are used to represent data in a circular format.

I saw many beach ball diagrams at the conference.

Harrod-Johnson diagrams are used to analyze economic models.

Role activity diagrams are used to model the interactions between different roles in a system.