* The book provides a basic understanding of the underlying theory, fundamentals and applications of magnetic resonance * The book implies a few levels of the consideration (from simple to complex) of phenomena, that can be useful for different groups of readers * The introductory chapter provides the necessary underpinning knowledge for newcomers to the methods * The exposition of theoretical materials goes from initial to final formulas through detailed intermediate expressions The book is devoted to the description of the fundamentals of various radiospectroscopic methods in the area of magnetic resonance and their use for the investigation of molecular structure and dynamics and for some technical applications. This book covers two domains: radiospectroscopy and quantum radioelectronics. Radiospectroscopy comprises nuclear magnetic resonance (NMR), electron paramagnetic resonance (EPR), nuclear quadrupolar resonance (NQR), and some other phenomena. The radiospectroscopic methods are widely used fo