This book is devoted to the technique of recording and graphical visualization of electrical processes and signals - oscillography . It is implemented with the help of devices - oscilloscopes .. Modern electronic oscilloscope - a measuring instrument unique in breadth of applications. These are the “eyes” of a person, which allowed him to look into the invisible world of the most complex electrical, and when using various sensors and other processes. Now an oscilloscope is the main device of a scientist who studies new physical processes, an engineer and a technician engaged in repair and adjustment of the most complex electronic equipment and a radio amateur who master the basics of electronics and radio engineering in practice. It is difficult to overestimate the role of the oscilloscope in the laboratories of higher education institutions and schools . The book will be useful to engineers and technicians of service services, researchers and graduate students, students and teachers of universities, experienced radio amateurs .