Invited Papers -- Trakhtenbrot Theorem and Fuzzy Logic -- Descriptive Complexity, Lower Bounds and Linear Time -- Testing of Finite State Systems -- Contributed Papers -- On the Power of Quantifiers in First-Order Algebraic Specification -- On the Effective Semantics of Nondeterministic, Nonmonotonic, Temporal Logic Databases -- Revision Programming = Logic Programming + Integrity Constraints -- Quantifiers and the System KE: Some Surprising Results -- Choice Construct and Lindström Logics -- Monadic NP and Graph Minors -- Invariant Definability and P/poly -- Computational Complexity of Ehrenfeucht-Fraïssé Games on Finite Structures -- An Upper Bound for Minimal Resolution Refutations -- On an Optimal Deterministic Algorithm for SAT -- Characteristic Properties of Majorant-Computability Over the Reals -- Theorems of Péter and Parsons in Computer Programming -- Kripke, Belnap, Urquhart and Relevant Decidability & Complexity -- Existence and Uniqueness of Normal Forms in Pure Type Systems with ??-conversion -- Normalization of Typable Terms by Superdevelopments -- Subtyping Functional+Nonempty Record Types -- Monotone Fixed-Point Types and Strong Normalization -- Morphisms and Partitions of V-sets -- Computational Adequacy in an Elementary Topos -- Logical Relations and Inductive/Coinductive Types -- On the Complexity of H-Subsumption -- Complexity Classes and Rewrite Systems with Polynomial Interpretation -- RPO Constraint Solving Is in NP -- Quantifier Elimination in Fuzzy Logic -- Many-Valued First-Order Logics with Probabilistic Semantics.