The monograph represents the first attempt in the world literature to analytically consider the current state of development of applications (including promising) of dielectric materials in electronic engineering. It describes the special properties of dielectrics: linear and nonlinear dielectric, piezo-, pyro-, ferroelectric, ferroelastic, electro-, acoustic-, nonlinear-optical, laser-geyer. Correlation between the measure of the severity of specific properties and the structural features that determine them. Characteristics of the main types of devices used and proposed, including integral and multifunctional devices, are given. A system of quality criteria for considered materials in relation to their types of applications has been proposed. The characteristics of the used and newly proposed materials, as well as typical IETs and IFEs with functional elements from dielectric materials with special properties. are detailed. The article analyzes the prospects for the development of individual areas, formulates forecast lists of new materials. The book can be used as a modern reference guide when choosing material for solving a number of applied problems. Designed for researchers and engineers of electronic, radio and computer engineering and instrumentation, as well as senior students of relevant specialties .