1 Modules.- 2 Complexes.- 3 Categorical Constructions.- 4 Equivalences and Isomorphisms.- 5 Resolutions.- 6 The Derived Category.- 7 Derived Functors.- 8 Homological Dimensions.- 9 Gorenstein Homological Dimensions.- 10 Dualizing Complexes.- 11 Torsion and Completion.- 12 A Brief for Commutative Ring Theorists.- 13 Derived Torsion and Completion.- 14 Krull Dimension, Depth, and Width.- 15 Support Theories.- 16 Homological Invariants over Local Rings.- 17 Going Local.- 18 Dualities and Cohen-Macaulay Rings.- 19 Gorenstein Dimensions and Gorenstein Rings.- 20 Global Dimension and Regular Rings.- APPENDIX A: Acyclicity and Boundedness.- APPENDIX B: Minimality.- APPENDIX C: Structure of Injective Modules.- APPENDIX D: Projective Dimension of Flat Modules.- APPENDIX E: Triangulated Categories.