1. Introduction.- 1.a. Present Status of the Interacting Boson Model.- 2. Phenomenology and Symmetries of the Interacting Boson Model.- 2.a. A Phenomenological Study of Even-Even Nuclei in the Neutron-Proton IBA.- 2.b. The IBA in the Os-Pt Region.- 2.c. A?150 Transitional Region and the Interacting Boson Model.- 2.d. Collective States in Some Transitional Nuclei with 28?Z, N?50.- 2.e. Systematics of Experimental Properties of Low-Lying States in Even Ru and Pd Nuclei.- 2.f. B(E2)-Values of High Spin States in 158Dy.- 3. Microscopic Theory of The Interacting Boson Model.- 3.a. Shell Model Description of Interacting Bosons.- 3.b. Nuclear Shell Model and Interacting Bosons.- 3.c. Fermion Hamiltonians with Monopole and Quadrupole Pairing.- 3.d. Shell Model Tests of the Interacting Boson Model Description of Nuclear Collective Motion.- 4. Applications to Reactions.- 4.a. Electron Scattering in the Interacting Boson Model.- 5. Relation to other Models.- 5.a. Nuclear Field Theory Treatment of the Interacting Boson Model.- 5.b. On the Interaction of Many-Phonon Monopole Pairing Vibrations.- 5.c. On the Relation Between the 0(6) Limit of the Interacting Boson Model and Triaxial Nuclear Models.- 5.d. IBM Versus Quadrupole Phonons.- 6. Conclusions.- 6.a. General Remarks Regarding the Interacting Boson Model and Approximation.- 6.b. Concluding Remarks.- Participants.