A113: This pays homage to a classroom at CalArts, the alma mater of Pixar/Disney executive John Lasseter and director Brad Bird. You can bet it will be on a license plate or somewhere else in the film at some point. I've actually heard that it is on a press sticker this time around for a "Shannon Spokes."
Pizza Planet: This is a fictional pizza restaurant that appears in Toy Story.
Dinoco: This is a fictional oil company that first appeared in Toy Story. I actually wouldn't be surprised to see a not to The Good Dinosaur or Arlo.
Plays on words like "Buzz Lightyear" or other such characters: In Cars, the tires of all the Piston Cup racers are Lightyear Buzzard tires. I expect Pixar to make some kind of reference to its other films through a play on words.
Buy N Large (BnL): This is a mega corporation that first appeared in WALL-E that controlled all economic and government services on Earth.