Alternative form of S/F ratio

The parent genre encompassing the genres of science fiction, fantasy fiction and horror fiction; speculative fiction; imaginative fiction; non-mimetic fiction.

Russian Soviet Federative Socialist Republic, the name for modern day Russia before the collapse of the Soviet Union (1917-1991).

Russian Soviet Federative Socialist Republic (Russian SFSR) (1917-1991). / Transcaucasian Socialist Federative Soviet Republic (Transcaucasian SFSR) (1922-1936).

(historical) A Soviet republic consisting of Georgia, Armenia, and Azerbaijan with its capital in Tbilisi (1922–1936).

plural of SFSR