Introduction. Symbols. 1. Radicals, Local and Semisimple Modules. 2. Projective and Injective Modules. 3. Bezout and Regular Modules. 4. Continuous and Finite-Dimensional Modules. 5. Rings of Quotients. 6. Flat Modules and Semiperfect Rings. 7. Semihereditary and Invariant Rings. 8. Endomorphism Rings. 9. Distributive Rings with Maximum Conditions. 10. Self-Injective and Skew-Injective Rings. 11. Semidistributive and Serial Rings. 12. Monoid Rings...