Entity relationship diagram, data FLOW diagram, use case diagram, class diagram, activity diagram, state chart diagram, SEQUENCE diagram, collaboration diagram, component diagrams, deployment diagrams etc..
Use case diagram: basically explains the BUSINESS environment. Series of all related actions PERFORMED by actor.
Activity diagram: Used in the early stage of analysis and designing level. It describes each individual component.
Sequence diagram: It tells the objects INTERACTIONS with each other’s arranged in time sequence.

Entity relationship diagram, data flow diagram, use case diagram, class diagram, activity diagram, state chart diagram, sequence diagram, collaboration diagram, component diagrams, deployment diagrams etc..
Use case diagram: basically explains the business environment. Series of all related actions performed by actor.
Activity diagram: Used in the early stage of analysis and designing level. It describes each individual component.
Sequence diagram: It tells the objects interactions with each other’s arranged in time sequence.