I recall from my days of mildish fandom that people who were really into Science Fiction disliked the term Sci Fi, and generally would use SF as the preferred abbreviation: esp the actual writers & practitioners (of whom I knew many as I happened to share a Hampstead flat in youth with one, John Brunner, who was a great partygiver so that visiting great US writers like Tom Disch & Phil Heinlein & Phil Dick, & British ones like John Wyndham, Brian Aldiss, John Christopher, Arthur C Clarke, et al, often came by, or were at the regular Thursday SF meet at the Globe in Covent Garden. John Brunner went on to win Hugo Awards & such.}

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