Rademacher functions in L_p-spaces -- The Rademacher system in symmetric spaces situated "far" from L_\infty -- The Rademacher system in symmetric spaces situated "close" to L_\infty -- Rademacher sums with vector coefficients -- Best constants in the Khintchine and Kahane-Khintchine inequalities -- The Rademacher chaos in symmetric spaces -- The comparison of systems of random variables -- The extraction of lacunary subsystems -- Extreme properties of the Rademacher system -- Bernoulli processes -- Rademacher multiplicator spaces -- Some versions of the Khintchine inequality -- Martingale transforms of the Rademacher sequence in symmetric spaces -- Rademacher functions in BMO and Paley spaces -- Rademacher functions in Cesaro type spaces -- Rademacher functions in Morrey spaces -- Appendix A. Some preliminaries from probability theory -- Appendix B. Basic sequences and lacunary systems -- Appendix C. Banach function lattices and symmetric spaces -- Appendix D. Interpolation of operators and spaces of the real method of interpolation.