This two volume set LNCS 8634 and LNCS 8635 constitutes the refereed conference proceedings of
the 39th International Symposium on Mathematical Foundations of Computer Science MFCS 2014
held in Budapest Hungary in August 2014. The 95 revised full papers presented together with 6
invited talks were carefully selected from 270 submissions. The focus of the conference was on
following topics: Logic Semantics Automata Theory of Programming Algorithms Complexity
Parallel and Distributed Computing Quantum Computing Automata Grammars and Formal Languages
Combinatorics on Words Trees and Games.
