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Reference.org
State diagram
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<p>A state diagram is used in <a href="/facts/Computer_science/lN3pEyPz">computer science</a> and related fields to describe the behavior of systems. State diagrams require that the system is composed of a finite number of <a href="/facts/State_(computer_science)/4Yu8xXHS">states</a>. Sometimes, this is indeed the case, while at other times this is a reasonable <a href="/facts/Abstraction_(computer_science)/hAnxmJle">abstraction</a>. Many forms of state diagrams exist, which differ slightly and have different <a href="/facts/Semantics/1L4WwLAP">semantics</a>. </p>