title: What is difference between State-transition diagram and Use case
body: <p>Guys can you please explain me what the difference is between the <strong>State-transition</strong> diagram and a <strong>Use case</strong>? Because it seems to me that those things are very similar and I can't find any proper definition which will show the differences. I'll be very grateful if someone at least give me a hint where I can read about this!</p>