Fiction is the classification for any story or universe derived from imagination—in other words, not based strictly on history or fact. Fiction can be expressed in a variety of formats, including writings, live performances, films, television programs, animations, video games, and role-playing games, though the term originally and most commonly refers to the narrative forms of literature (see literary fiction), including the novel, novella, short story, and play. Fiction constitutes an act of creative invention, so that faithfulness to reality is not typically assumed; in other words, fiction is not expected to present only characters who are actual people or descriptions that are factually true. The context of fiction is generally open to interpretation, due to fiction's freedom from any necessary embedding in reality; however, some fictional works are claimed to be, or marketed as, historically or factually accurate, complicating the traditional distinction between fiction and non-fiction. Fiction is a classification or category, rather than a specific mode or genre, unless used in a narrower sense as a synonym for a particular literary fiction form.
Fiction is commonly broken down into a variety of genres: subsets of fiction, each differentiated by a particular unifying tone or style, narrative technique, content, or popularly defined criterion. Science fiction, for example, predicts or supposes technologies that are not realities at the time of the work's creation. For example, Jules Verne's novel From the Earth to the Moon was published in 1865 and in 1969, astronaut Neil Armstrong landed on the moon.