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Product Description A well-written and accessible introduction to the most important features of formal languages and automata theory. It focuses on the key concepts, illustrating potentially intimidating material through diagrams and pictorial representations, and this edition includes new and expanded coverage of topics such as: reduction and simplification of material on Turing machines; complexity and O notation; propositional logic and first order predicate logic. Aimed primarily at computer scientists rather than mathematicians, algorithms and proofs are presented informally through examples, and there are numerous exercises (many with solutions) and an extensive glossary. Review From the reviews: "The book is accessible to students with limited mathematical training … . The text is illustrated with nice pictures; there are many exercises and some of them have sketchy solutions grouped in a special section. The book also includes comments on further readings and a good index." (Cristian S. Calude, Zentralblatt MATH, Vol. 1041 (16), 2004)