Bordism groups of orientation preserving diffeomorphisms -- Report about equivariant Witt groups -- The isometric structure of a diffeomorphism -- The mapping torus of a diffeomorphism -- Fibrations over S1 within their bordism class and the computation of ?* -- Addition and subtraction of handles -- Proof of Theorem 5.5 in the odd-dimensional case -- Proof of Theorem 5.5 in the even-dimensional case -- Bordism of diffeomorphisms on manifolds with additional normal structures like Spin-, unitary structures or framings; orientation reversing diffeomorphisms and the unoriented case -- Application to SK-groups -- Miscellaneous results: Ring structure, generators, relation to the inertia group.