Pages in this category should be moved to subcategories where applicable. This category may require frequent maintenance to avoid becoming too large. It should directly contain very few, if any, pages and should mainly contain subcategories.
While science fiction is a unique genre of fiction unto itself, it is also sometimes used as an umbrella term for a variety of distinct non-realistic or speculative fiction genres, most particularly fantasy. Conversely, speculative fiction is sometimes used as the umbrella term for SF, fantasy, Magic realism, horror, etc.