Science fiction is a broad genre of fiction that often takes place in the future and usually involves speculations based on current science. It is commonly abbreviated as SF or sci-fi. Science fiction is found in books, art, television, movies, games, theater, and other media. It is a form of speculative fiction principally dealing with the impact of imagined science and technology upon society and persons as individuals. The borders of this genre are not well defined, and the dividing lines between its sub-genres are often fluid. (Wikipedia definition.)