publication "Introduction to Automata Theory, Languages, and

Computation", by John Hopcroft and Jeffrey Ullman,

(Addison-Wesley, 1979). So called because the cover depicts a

girl (putatively Cinderella) sitting in front of a Rube

Goldberg device and holding a rope coming out of it. On the

back cover, the device is in shambles after she has

(inevitably) pulled on the rope.