This document provides an overview of the history and subgenres of horror movies. It discusses the earliest horror films from the late 1800s which featured supernatural elements like ghosts and devils. The 1920-1940 period saw the rise of classic horror films like Frankenstein and The Mummy. Subgenres that developed over time included slasher films, zombie movies, and psychological thrillers which relied more on tension and jump scares than graphic violence. Modern horror movies have benefited from advances in technology and special effects to create more realistic and immersive frightening scenes.