He was a founding member of the amateur press alliance (APA) Myriad and was active in the Southern Fandom Press Alliance, a southeastern-based science fiction amateur press association.
1952-2005 Active member and sometime Official Editor (OE) of the Spectator Amateur Press Society (SAPS), an Amateur press association.
Amateur press associations (APAs) publish fanzines made up of the contributions of the individual members collected into an assemblage or bundle called an apazine.
Association football | association football | Associated Press | Forward (association football) | Goalkeeper (association football) | Defender (association football) | National Basketball Association | Oxford University Press | American Association for the Advancement of Science | Association of Tennis Professionals | American Library Association | World Boxing Association | National Collegiate Athletic Association | American Association | American Heart Association | National Association of Intercollegiate Athletics | Cambridge University Press | National Rifle Association | International Development Association | National Association for the Advancement of Colored People | American Bar Association | Philippine Basketball Association | American Medical Association | St. Martin's Press | International Air Transport Association | United Press International | amateur | World Hockey Association | Women's Tennis Association | Gaelic Athletic Association |
A member of the Los Angeles Science Fantasy Society, an Official Editor of the comic book APA CAPA-alpha, and an early member of gaming fandom, he came into contact with a number of science fiction writers, notably Larry Niven and Jerry Pournelle, who, in their books, credit Dan Alderson with ideas that inspired some of their science fiction, notably the Alderson drive and the Alderson disk.