Show, a series which detailed the friendship between a dog and cat. Despite a lukewarm response for their first theatrical venture, Loopy De Loop, Hanna-Barbera soon established themselves with two successful television series: The Huckleberry Hound Show and The Yogi Bear Show. A 1960 survey showed that half of the viewers of Huckleberry Hound were adults. This prompted the company to create a new animated series, The Flintstones. A parody of The Honeymooners, the new show followed a typical Stone Age family with home appliances, talking animals, and celebrity guests. With an audience of both children and adults, The Flintstones became the first animated prime-time show to be a hit. Fred Flintstone's signature exclamation "yabba dabba doo" soon entered everyday usage, and the show boosted the studio to the top of the TV cartoon field. The company later produced a space-age version of The Flintstones, known as The Jetsons. Although both shows reappeared in the 1970s and 1980s, The Flintstones was far more popular. By the late 1960s, Hanna-Barbera Productions was the most successful television animation studio in the business. The Hanna-Barbera studio produced over 3,000 animated half-hour television shows. Among the more than 100 cartoon series and specials they produced were: Atom Ant, Augie Doggie and Doggie Daddy (an imitation of the earlier Spike and Tyke MGM cartoons), Jonny Quest, Josie and the Pussycats, Magilla Gorilla, Pixie and Dixie and Mr. Jinks, Quick Draw McGraw, and Top Cat. Top Cat was based on Phil Silvers's character Sgt. Bilko, though it has been erroneously reported that Sgt. Bilko was the basis for Yogi Bear. The Hanna-Barbera studio also produced Scooby-Doo (1969–91) and The Smurfs (1981–89). The company also produced animated specials based on Alice in Wonderland, Jack and the Beanstalk, Cyrano de Bergerac, as well as the feature-length film Charlotte's Web (1973). As popular as their cartoons were with 1960s audiences, they were disliked by artists. Television programs had lower budgets than theatrical animation, and this economic reality caused many animation studios to go out of business in the 1950s and 1960s, putting many people in the industry out of work. Hanna-Barbera was key in the development of limited animation, which allowed television animation to be more cost-effective, but also reduced quality. Hanna and Barbera had first experimented with these techniques in the early days of Tom and Jerry. To reduce the cost of each episode, shows often focused more