The collection contains a large number of different apazines. Most of these are concerned with science fiction and fantasy (both literary and in other media), but there are also apazines devoted to other genre topics, including comics, role-playing games, and mysteries. The earliest items in the collection include some early issues (1940s) of the first science fiction apa, Fantasy Amateur, but the collection reaches into the 21st century with issues of apazines that in some cases continue to be published today.

The apazines in the collection are arranged alphabetically by the formal name of the apa, not the name of the apa's official organ. In many cases the official organ for the apa bears a different name from that of the apa itself - for example, Dapa-Em's official organ was entitled Elementary.