4.2 Nondeterminism (click on the single black diamond)
(Note: the link to section 4.3 doies not exist. This entry is only here to indicate how the sections of chapter 4 on Finite State Automata would be included. in each case, the reader selects the direction to go by choosing the green circle (easy way through), blue square (intermediate way through), or black diamond(s) (most challenging way through).)