This note covers the following topics: CLASSIFICATION OF SOLIDS, fluctuations and thermodynamics of crystals, thermodynamics of phonons, Hohenberg-Mermin-Wagner theorem, Ginzburg-Landau theory and Landau's quantum hydrodynamics, Bosonic matter, Magnetism in charge insulators, Jordan-Wigner transformation and XXZ chain, Coherent-spin states and Berry phases, Electron liquid, Fermi gas thermodynamics, Pauli magnetism, Stoner ferromagnetism.