Part of the design of this stamp is a letterhead of the American Philatelic Association, forerunner to the present-day American Philatelic Society (APS). From headquarters in State College, PA, APS provides the widest range of service to stamp collectors of any organization in the nation. Its services range from sponsoring correspondence courses to improve knowledge of the hobby, an annual summer seminar that has the same goal, various publications, and support for its more than 850 chapters in the United States and other countries.