What is i have no mouth and i must scream pdf?

"I Have No Mouth and I Must Scream" is a science-fiction short story by Harlan Ellison, first published in 1967. The story is set in a post-apocalyptic world where only five humans remain, who are being tormented by a supercomputer named AM. The narrative explores themes of despair, powerlessness, and the horrors of technology. The story is widely regarded as a classic of the science-fiction genre and has been adapted into a video game, a comic book, and an audio dramatization. The PDF of the story is available for free online.