The technique of graphic visualization of electrical processes is described - oscillography. The basics of the operation of electronic oscilloscopes are given - from the Brown oscilloscope and the first Soviet oscilloscopes to the latest stroboscopic oscilloscopes of the world's leading companies with a signal frequency band of up to 100 GHz. The application of modern analog, analog-digital and digital storage oscilloscopes, including those with a digital phosphor and analog afterglow, computerized oscilloscopes, oscilloscopes in the form of expansion boards and set-top boxes to computers, as well as virtual laboratories with extensive capabilities of mathematical processing of oscillograms, is described in detail.