Hanna-Barbera were an American animation studio that was founded in 1957 by William Hanna and Joseph Barbera. They are best known for creating a wide variety of popular animated television series, such as The Flintstones, The Jetsons, Scooby-Doo, Yogi Bear, and many more. They were one of the most successful animation studios of the 20th century, producing over 3, 000 episodes of television during their time. The term 'Hanna-Barbera' is synonymous with the job of animator, as they were responsible for creating some of the most iconic cartoons of all time.