On the complexity of branching programs and decision trees for clique functions.- Average complexity of additive properties for multiway tries: A unified approach.- Longest common factor of two words.- An unification semi-algorithm for intersection type schemes.- Optimal run time optimization proved by a new look at abstract interpretations.- Transformation ordering.- On parametric algebraic specifications with clean error handling.- Toward formal development of programs from algebraic specifications: Implementations revisited.- Finite algebraic specifications of semicomputable data types.- On the semantics of concurrency: Partial orders and transition systems.- CCS without ?'s.- A fully observational model for infinite behaviours of communicating systems.- SMoLCS-driven concurrent calculi.- Parameterized horn clause specifications: Proof theory and correctness.- Partial composition and recursion of module specifications.- Efficient representation of taxonomies.- Applications of compactness in the Smyth powerdomain of streams.- Characterizing Kripke structures in temporal logic.- Dialogue with a proof system.- Induction principles formalized in the calculus of constructions.- Algebraic semantics.