Remarks on the history and applications of integral representations -- Applications of the theory of orders to crystallographic groups -- Graham Higman's Thesis “Units in Group Rings” -- On the supercentre of a group and its ring theoretic generalization -- Some facts concerning integral representations of ideals in an algebraic number field -- Zeta-functions of orders -- The class group à la Fröhlich -- The Hermitian classgroup -- Fr?hlich's conjecture, logarithmic methods and Swan modules -- S-groupes de Grothendieck et structure galoisienne des anneaux d'entiers -- Ratios of rings of integers as Galios modules -- An extension of Miyata's Theorem on the transfer map from the classgroup of a finite dihedral group to that of its cyclic maximal subgroup -- Hecke actions on Picard groups and class groups -- Uses of units in Whitehead groups -- Integral Representations in the theory of finite CW-complexes -- Lenstra's calculation of GO (R ?), and applications to Morse-Smale diffeomorphisms -- Algebraic geometry of ternary quadratic forms and orders in quaternion algebras -- Preprojective lattices over classical orders -- Poset representations -- Grothendieck groups and almost split sequences -- Representation types of group rings over complete discrete valuation rings -- On blocks of finite lattice type II -- The Auslander-Reiten-graph of blocks with cyclic defect two -- On the representation type of twisted group rings -- The complexity and varieties of modules -- Restricting ?G-Lattices to elementary abelian subgroups -- The lattice type of orders II: Auslander-Reinten quivers.