The document provides a history of Walt Disney Studios and their animated shorts and films from 1921 to 2012. It discusses the evolution of Disney animation from their early live action/animated shorts called the "Alice Comedies" in the 1920s to the creation of Mickey Mouse in 1928. Over time, Disney added many beloved characters like Pluto, Donald Duck, and Goofy to their film universe. The style and technology of Disney animation advanced significantly over the decades from hand drawn cel animation to computer generated imagery. Different Disney films also experimented with unique animation styles tailored to their stories and settings.