An oscilloscope is an electronic instrument used to visualize and analyze the waveform of electrical signals. It displays voltage changes over time on a screen, allowing users to see the shape, frequency, and amplitude of the signal. This makes it a valuable tool in various fields, including electronics, engineering, and telecommunications. Oscilloscopes can capture and display complex signals, helping engineers troubleshoot circuits and design new devices. They come in different types, such as digital oscilloscopes and analog oscilloscopes, each with unique features suited for specific applications. Understanding how to read an oscilloscope's display is essential for effective signal analysis.