The American Philatelic Society (APS) is the world's largest, nonprofit society for stamp collectors. Founded in 1886, APS is supported entirely by membership dues, gifts, and the sale of its publications and services. No matter what you collect - worldwide, the stamps or postal history of a particular country, or by topic - APS membership will help you gain more enjoyment from your hobby and places you among a well-organized and long-established group of collectors associated for mutual benefit.
APS Statement of Purpose:
For more information, please visit the official APS website: https://www.stamps.org