Fandom is a term used to refer to a subculture composed of fans characterized by a feeling of sympathy and camaraderie with others who share a common interest. Fans typically are interested in even minor details of the object(s) of their fandom.
These are examples of different fan cultures.
Science fiction fandom dates back to the 1930s and maintains organized clubs and associations in many cities around the world. It has held the annual World Science Fiction Convention since 1939, along with many other events each year, and has created its own jargon. Media fandom shot off from science fiction fandom in the early 1970s with a focus on relationships between characters within TV and movie media franchises.
Anime and manga fandom began in the 1970s in Japan. In America, the fandom also began as an offshoot of science fiction fandom, with fans bringing imported copies of Japanese manga to conventions. Before anime began to be licensed in the U.S., fans who wanted to get a hold of anime would leak copies of anime movies and subtitle them to exchange with friends in the community, thus marking the start of fan subs.
Developments on the Internet have had profound effects on the anime fan community and the way in which anime is consumed. Additionally, fan interest in anime has inspired many developments in technology. Roughly 68% of fans obtain anime through downloading from the Internet or through their friends, a much larger proportion than in any other medium. As a result, fans have made some of the most sophisticated advances in peer-to-peer software in order to make searching for and downloading anime online faster.