Abstract: In this paper,a historical review of the Quantum Eletuonics and Laser Physics is given in the context of the physical coneepts originated from the nuclear magnetic resonance which has made great contributions to their development.
The following aspects which play an important role in their development are particularly considered:the dynamica of interaction of atomic systems with radiation in the real sense of "resonance",the importance of the cooperative interaction of atoms in which the phase coherence plays a significant role,the different methods and mechanisms for manipulation of population distribution of atoms including the population invereion,the functions of the resonant circuits and the cavities in the interaction and the emergence and the explanation of the coherent transient phenomena.This paper is devoted to the 50th annivereary of the advent of the nuclear magnetic resonancein condensed matter.

Key words: Nuclear magnetic resonance, Quantum electronics, Maser, Laser