During the last decades frontieres in various branches of physics have been investigated, especially for describing coherent effects, with very similar methodologies. In particular, the quantum-like formalism has recently received a great deal of attention for describing a number of 'classical topics', such as charged particle beam optics and dynamics in accelerating machines, plasma physics, nonlinear optics, transmission lines, solid state physics. On the other hand, proper quantum models that have been applied to coherent correlated states, squeezed states, macroscopic quantum coherence in superconductivity, superradiance in condensed matter, stochastic mechanics, have also been recently developed in way fully similar to the one used for quantum-like models. The quantum-like approach seems, therefore, to form a common basis for understanding the observations in many diverse field of science.This volume collects very significant examples of these common methodologies that have been given by various quantum-like approaches for describing numerious physical scenarios in the above branches of physics.