The mysterious combination of numbers and letters 'A113' that has been popping up in Pixar films for over a decade is well known to people in the animation industry. The secret behind the code, which made appearances in various forms in the Toy Story trilogy, Finding Nemo, A Bug’s Life, Up, Brave, as well as animated shows like The Simpsons and American Dad, and even live-action movies like Hunger Games: Catching Fire, is that it's an intentional inside joke. As it turns out, 'A113' is the number of a classroom at the famed California Institute of Arts where the first generation of animators studied graphic design and character animation. …(omitted)…  According to a Wiki page dedicated to A113, the code has appeared in at least 45 cartoons, movies and even video games.