A kernel language for abstract data types and modules -- A semantics of multiple inheritance -- Understanding Russell a first attempt -- A basic Abstract Semantic Algebra -- Using information systems to solve reoursive domain equations effectively -- The semantics of second order polymorphic lambda calculus -- Polymorphism is not set-theoretic -- A theory of data type representation independence -- Abstract data types and their extensions within a constructive logic -- Deriving structural induction in LCF -- Executable specification of static semantics -- Cartesian closed categories of enumerations for effective type structures -- Type inference and type containment -- F-semantics for intersection type discipline -- The typechecking of programs with implicit type structure -- Partial implementations of abstract data types: A dissenting view on errors -- Building specifications in an arbitrary institution -- A proof system for verifying composability of abstract implementations -- Towards a proof theory of parameterized specifications.