Machines Computations and Universality : Third International Conference MCU 2001 ChişinĂu Moldova May 23–27 2001 Proceedings This book constitutes the refereed proceedings of the Third International Conference on Machines Computations and Universality MCU 2001 held in Chisinau Moldavia in May 2001. The book presents nine invited papers together with 13 revised refereed papers selected during a thorough round of reviewing. Among the topics covered are cellular automata molecular computing quantum computing formal languages and automata theory and computational complexity