Trivia: The number "A113" has appeared in every Pixar film. In this film, it appears as a sign seen in the background when Sulley sees Smitty and Needleman loading the trash compactor.
moviedude345
5th Mar 2009
Monsters, Inc. (2001)
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Suggested correction: No, the sign has the number "431" on it. There are several instances in the film where A113 is speculated to be hidden, but none have actually been confirmed. There is also a video on Pixar's YouTube channel which points out all the A113 references in their films, but Monsters, Inc has been left out: https://www.youtube.com/watch?v=NyrrZqPI42I. So, it seems like this is the only Pixar film to not have an A113 reference, or it does but it hasn't been found yet. (I believe it's the former.)