The book outlines the physical and technical foundations for creating and applying high voltage pulses with very high power and energy. The first part describes the components, materials and measurement methods used in the technique of obtaining powerful pulses. In the second part - some of the most promising applications of this technique in bioelectrics, surface metal processing, medicine, selective grinding of various materials, etc., namely: generators of powerful pulses of electric and magnetic fields, sources of intense pulsed radiation and pulsed electric discharges.