Table of contents : Contents......Page 14 Preface......Page 8 Notation......Page 16 I Simple Modules......Page 18 1. On Annihilators of Modules......Page 20 2. The Structure of Simple Modules over Abelian Groups......Page 34 3. The Structure of Simple Modules over Some Generalizations of Abelian Groups......Page 42 4. Complements of Simple Submodules......Page 56 II Just Infinite Modules......Page 62 5. Some Results on Modules over Dedekind Domains......Page 64 6. Just Infinite Modules over FC-Hypercentral Groups......Page 78 7. Just Infinite Modules over Groups of Finite 0-Rank......Page 94 8. Just Infinite Modules over Polycyclic-by-Finite Groups......Page 108 9. Co-Layer-Finite Modules over Dedekind Domains......Page 118 III Just Non-X-Groups......Page 124 10. The Fitting Subgroup of Some Just Non-X-Groups......Page 126 11. Just Non-Abelain Groups......Page 132 12. Just Non-Hypercentral Groups and Just Non-Hypercentral Modules......Page 138 13. Groups with Many Nilpotent Factor-Groups......Page 148 14. Groups with Proper Periodic Factor-Groups......Page 160 15. Just Non-(Polycyclic-by-Finite) Groups......Page 172 16. Just Non-CC-Groups and Related Classes......Page 182 17. Groups Whose Proper Factor-Groups Have a Transitive Normality Relation......Page 198 Bibliography......Page 220 Author Index......Page 238 Subject Index......Page 242