The chime comes from The Jetsons, Hanna-Barbera's animated sitcom about a family living in a high-tech future, which first aired in the United States in 1962. The show's futuristic household gadgets, flying cars and robot maid made its everyday sounds memorable, and the doorbell became one of its most recognisable audio signatures. Reruns kept it familiar for later generations, and short clips and soundboards later carried it onto video platforms, where creators now reuse it as shorthand for retro futurism and a playful, space-age entrance.