The organ is a keyboard instrument with a long history, known for its rich and resonant sound. It comes in various types, including the traditional pipe organ, electronic organs, and hybrid organs that combine elements of both.

Pipe organs consist of a series of pipes controlled by a keyboard and foot pedals. The pipes are activated by air pressure, producing a wide range of tones. Electronic organs use technology to replicate the sound of pipe organs, offering portability and affordability. Hybrid organs provide a blend of traditional and electronic elements.

Key components of a pipe organ include the manuals, which are the keyboards played by the hands, and the pedals operated by the feet. Stops control the selection of pipes and can change the organ's sound, allowing for a variety of tonal colors. Bellows provide the air that makes the pipes sound when the keys or pedals are pressed, and the pipes themselves are the sound-producing elements, made from materials like wood or metal.

Playing the organ requires the coordination of both hands and feet, with the left hand often playing bass lines and chords while the right hand plays the melody. The feet operate the pedals to provide a bass foundation.

Organs are used in religious services, where they have been a mainstay for centuries, as well as in classical music with a significant repertoire written by composers such as Bach and Saint-Saëns. They also feature in jazz, rock, and pop music, particularly with the advent of electronic organs.

The organ's versatility and its ability to produce a broad spectrum of sounds have made it an enduring instrument across different musical genres and settings.