Pixar's (www.pixar.com) animated shorts from 1984 to 2006 show the development of its animation. In 1984, John Lasseter resigned from his job as an animator at Disney and joined George Lucas's computer special effects company, which was the predecessor of Pixar. That same year, he began creating his first 3-D short film, "The Adventures of André and Wally B." Pixar's animated shorts have been nominated multiple times and have won the Oscar for Best Animated Short Film on several occasions.
You can download resources on VeryCD, and Pixar's official website has English plot introductions of the shorts.
Enjoy! ^^