 SF Canada, Canada's National Association of Speculative Fiction Professionals, was established in 1992.Some of the most famous Canadian writers of science fiction include Margaret Atwood, John Clute, Charles de Lint, Cory Doctorow, James Alan Gardner, William Gibson, Ed Greenwood, Tanya Huff, H. L. Gold, Nalo Hopkinson, Guy Gavriel Kay, Judith Merril, Spider Robinson, Robert J. Sawyer, Karl Schroeder, Judith and Garfield Reeves-Stevens, A. E. van Vogt, and Robert Charles Wilson.The Canadian Broadcasting Company began producing science fiction as early as the 1950s.