This paper reviews current research in high-power picosecond electronics, a branch of experimental engineering physics, whose dynamic development critically depends on national priority research projects. The aim of the review is basically to show progress in the study of picosecond processes involved in the accumulation, commutation, and transformation of high-density electric power. Examples are presented demonstrating what the latest built high-voltage picosecond facilities will potentially fundamentally contribute to developments in generating unique-property high-power electron beams and electromagnetic radiation pulses.