Developments in Concurrent Kleene Algebra (Invited Talk) -- Endowing Concurrent Kleene Algebra with Communication Actions -- Concurrent Kleene Algebra with Tests -- Algebras for Program Correctness in Isabelle/HOL -- Completeness Theorems for Bi-Kleene Algebras and Series-Parallel Rational Pomset Languages -- A Modified Completeness Theorem of KAT and Decidability of Term Reducibility -- Kleene Algebra with Converse -- Preparing Relational Algebra for “Just Good Enough” Hardware (Invited Talk) -- Extended Conscriptions Algebraically -- Abstract Dynamic Frames -- Automated Verification of Relational While-Programs -- On Faults and Faulty Programs -- Parameterised Bisimulations: Some Applications -- A Point-Free Relation-Algebraic Approach to General Topology -- A Mechanised Abstract Formalisation of Concept Lattices -- A Sufficient Condition for Liftable Adjunctions between Eilenberg-Moore Categories -- Higher-Order Arrow Categories -- Type-2 Fuzzy Controllers in Arrow Categories.-Relation Algebra and RelView Applied to Approval Voting -- Relational Lattices -- Towards Finding Maximal Subrelations with Desired Properties -- Complete Solution of a Constrained Tropical Optimization Problem with Application to Location Analysis -- Refinements of the RCC25 Composition Table -- Fuzzifying Modal Algebra -- Tableau Development for a Bi- intuitionistic Tense Logic -- Nominal Sets over Algebraic Atoms -- Fixed-Point Theory in the Varieties Dn.