A Bas was an early Canadian fanzine edited by Boyd Raeburn. Published in Toronto, Ontario, A Bas lasted for 11 issues in the 1950s. It was initially linked to The Toronto SF Society (a group who called themselves "The Derelicts"). A Bas was far removed from the professional SF magazines of the time; its mimeographed issues often focused on aspects of 1950s fan culture. It contained a regular feature called "Derelicti Derogations" that was based on conversations held during fan meetings; this provided a sample of the specialized language that was used in contemporary fandom.