The Douglas DC-8 is a four-engine jet airliner that was first introduced in 1958. It was one of the first commercial jets to compete with the Boeing 707 and played a significant role in the development of modern air travel. The DC-8 was known for its reliability and efficiency, making it a popular choice for airlines around the world. Over its production run, which lasted until 1972, more than 500 units of the DC-8 were built. The aircraft was used for both passenger and cargo services, and its versatility allowed it to operate in various configurations. The DC-8 remains an important part of aviation history.