Dinoco

Beginning with Red's Dream and its references to previous Pixar short films, Pixar has included references in its films to other works produced by the studio. These have included cameo appearances, references to characters, objects, and titles of works. Additionally, such easter eggs or in-jokes can refer to Pixar staff, associates, or places or events from the company's past. Lastly, some items, such as A113, Pizza Planet or actor John Ratzenberger have appeared in the majority of Pixar films, establishing a set of traditions that subsequent Pixar films try to include.

The following is a list of all documented self-referential nods contained within Pixar films and shorts that the various filmmakers have incorporated into their movies.

A113 is an Easter egg that has been inserted into several animated television shows and feature films as a homage to a classroom at CalArts, the alma mater of Pixar/Disney executive John Lasseter and director Brad Bird, among others. Bird was the first to use the A113 Easter egg, on a car license plate in an animated segment entitled Family Dog in a 1987 episode of the television series Amazing Stories.

John Lasseter calls actor John Ratzenberger "Pixar's good luck charm", as Ratzenberger has played a role in each Pixar feature.

A yellow ball with a blue stripe and a red star, which was first shown in the short Luxo, Jr., has been shown in several Pixar feature films and shorts, most prominently in the Toy Story franchise.

Pizza Planet is a fictional pizza restaurant that appears in Toy Story. In the film, it is a large, sci-fi-themed restaurant with arcade games including robot guards at the entrance. The company runs a fleet of derelict Toyota Hilux pickup trucks (as evidenced by the inscription on the tailgate; it is a Toyota inscription with the first and last two letters, "TO" and "TA", worn off so it simply appears as "YO") with a rocket on the roof featuring the restaurant's logo, as seen in Toy Story, Toy Story 2 and Toy Story 3 (though in Toy Story 2, the truck model is called a "Gyoza" as seen on the owner's manual). There is a Pizza Planet reference in every Pixar feature film to date except for the film The Incredibles. Lee Unkrich has said that there is no Pizza Planet truck anywhere in The Incredibles.

...
Wikipedia