APA stands for
Amateur
Press
Association. It's a zine made of a copy of every zine produced by the members. Each one sends the appropriate number of copies to a person known as the Central Mailer (CM, or DM for Distribution Manager). This person
addscompiles the zines like this and then sends the final result to the members. The result: a "phone book" (hopefully): a packet of about 100 pages, maybe more.One example of this: Comicopia. An APA about comicbooks founded by Jeff Boman in 1990, still running today. In April 2007, its 100th mailing (issue) is being put together.Links:* Comicopia website* APAs on Wikipedia, with many others listed* A site about APAs and many kinds of zines (also a Wetpaint Community)