This is brainchild of RDM, with very valuable inputs from J and Yours Truly.
This, people, is a DFA or Deterministic Finite Automata as it is popularly known as. The circles(if you can call it that) represent various states in a process and the words on the arrows are the conditions to jump from one state to another.I can’t provide any better explanation than this.
Seriously geeky stuff, even most of the techies who claim to actually understand it are lying. Take my word for it.