An oscillator is a device or system that produces a repetitive, oscillating motion or signal. It can be found in various forms, such as mechanical, electrical, or electronic. Common examples include pendulums, tuning forks, and circuits that generate alternating current. Oscillators are essential in many applications, including clocks, radios, and signal generators. In electronics, an oscillator generates a continuous waveform, often in the form of a sine wave or square wave. These waveforms are crucial for transmitting information in communication systems, such as those used in radio and television broadcasting. Oscillators help maintain stable frequencies, ensuring reliable performance in various technologies.