Invited Talks -- Regular and Algebraic Words and Ordinals -- Logical Semantics of Types for Concurrency -- Deriving Bisimulation Congruences with Borrowed Contexts -- Symmetry and Concurrency -- Contributed Papers -- Ready to Preorder: Get Your BCCSP Axiomatization for Free! -- Impossibility Results for the Equational Theory of Timed CCS -- Conceptual Data Modeling with Constraints in Maude -- Datatypes in Memory -- Bisimilarity and Behaviour-Preserving Reconfigurations of Open Petri Nets -- Free Modal Algebras: A Coalgebraic Perspective -- Coalgebraic Epistemic Update Without Change of Model -- The Maude Formal Tool Environment -- Bifinite Chu Spaces -- Structured Co-spans: An Algebra of Interaction Protocols -- Graphical Encoding of a Spatial Logic for the ?-Calculus -- Higher Dimensional Trees, Algebraically -- A Semantic Characterization of Unbounded-Nondeterministic Abstract State Machines -- Parametric (Co)Iteration vs. Primitive Direcursion -- Bisimulation for Neighbourhood Structures -- Algebraic Models of Simultaneous Multithreaded and Multi-core Processors -- Quasitoposes, Quasiadhesive Categories and Artin Glueing -- Applications of Metric Coinduction -- The Goldblatt-Thomason Theorem for Coalgebras -- Specification-Based Testing for CoCasl's Modal Specifications -- CIRC: A Circular Coinductive Prover -- Observing Distributed Computation. A Dynamic-Epistemic Approach -- Nabla Algebras and Chu Spaces -- An Institutional Version of Gödel's Completeness Theorem -- Coalgebraic Foundations of Linear Systems -- Bootstrapping Types and Cotypes in HasCASL.