 None of these contributions by Dedekind can be treated in any detail here (and various others have to be ignored completely), but some general observations about them can be made. While they again exemplify a set-theoretic and infinitary perspective, they also display the following related features: the focus on entire systems of objects and on general laws for them; the move away from particular formulas, or from particular symbolic representations, to more general characterizations of the underlying systems of objects, specifically in terms of relational and functional properties; the consideration of homomorphisms, automorphisms, isomorphisms, and features invariant under such mappings; and the investigation of novel, abstract concepts, introduced in connection with specific cases but then studied in themselves.