Initialism for the Association of Science Fiction and Fantasy Artists, a nonprofit education association open to all those involved with sf and fantasy art in either a professional or an amateur capacity. ASFA promotes such work and its creators' rights in various ways, most conspicuously by presenting the Chesley Awards (which see), named for Chesley Bonestell and given annually since 1985.
Vincent Di Fate was a cofounder of ASFA and served as its first President. As with SFWA, the "and Fantasy" was added to the organization title while keeping a single F in the short version. [DRL]
see also: David A Cherry; David A Hardy.