Science fiction (abbreviated SF or sci-fi with varying punctuation and case) is a broad genre of fiction that often involves sociological and technical speculations based on current or future science or technology. This is a reader-selected collection of short stories, first published between 1951 – 1962, that entered the US public domain when their copyright was not renewed.
Summary by Cori Samuel, with Wikipedia input.
http://librivox.org/short-science-fiction-collection-vol-013
