Science-fiction fandom in the context of "Science fiction convention"

A science fiction convention is the gathering of fans of the speculative fiction subgenre, science fiction. Historically, science fiction conventions had focused primarily on literature, but the purview of many extends to such other avenues of expression as films, television, comics, animation, and games. The format can vary but will tend to have a few similar features such as a guest of honour, discussion panels, readings and large special events such as opening/closing ceremonies and some form of party or entertainment. Science fiction conventions started off primarily in the United Kingdom and the United States but have now spread further. Several countries have their own individual conventions, as well as playing host to rotating international conventions.