from Fancyclopedia 2 ca. 1959
The publishing house symbol for Unger's pubs; it stands for Fantasy Fiction Field. Suddsy Schwartz pronounced this "triple ef".

from Fancyclopedia 2 Supplement ca. 1960:
Speer grotched at my misreading of his phonetic symbols, and informed me that Suddsy Schwartz pronounced this contraction "tripel ef".
from Fancyclopedia 1 ca. 1944
Fantasy Fans' Fraternity. An organization of the First Fandom, this ignorant one believes; apparently nothing more than a name.

FFF has also become the publishing house symbol of Unger's publications. It stands for Fantasy Fiction Field, and is often called Triple-F (pronounced [traipel ef] [stuff in [hand written] by Suddsy).