In George Orwell's 1984, if my understanding is correct Winston Smith's job is basically to find items in printed works that disagree with the Party's current ideology and edit/remove them - (e.g. flush the offending parts down "memory holes").
The idea being, with no written evidence of a fact, people can only rely on their own malleable memory which the Party can easily manipulate into believing the current orthodoxy.
But do people not have copies of books and newspapers at home? How do Winston and his co-workers edit those?