Guest of Honor: Westercon 32 (1979);
Edgar Rice Burroughs conference, 1994;
Convocation Guest of Honor, Manchester College (IN), 2002.
TM: NorWesCon 5 (1982); World Fantasy Convention, 1998.
Hugo, 1963, Best Fanzine.
Numerous Hugo and Nebula Nominations; Oscar Nomination, 1990; Lifetime Achievement Award (Edgar Rice Burroughs), 1994; Independent Publishers Books Award, 2001; Let Us Now Praise Lurid Nonsense Award, 2001; Lifetime Achievement Award (Left Coast Crime), 2004.
Clubs/organizations: New York Futurian Society; Fanoclasts (founding member).
Fanzines: XERO, HORIB.