This document provides a summary of various zombie movies, books, games, and pop culture references from 1920 to 2009. It mentions early zombie films from the 1920s and 1930s like The Cabinet of Dr. Caligari and The Mummy. It then discusses influential late 20th century zombie films and their themes, including Night of the Living Dead, Dawn of the Dead, and Day of the Dead. It also references many popular 21st century zombie stories across media and includes quotes about the genre from George Romero.