American Topical Association (ATA)
The American Topical Association (ATA) serves members in 65 countries. It is the largest philatelic society devoted to this specific area of stamp collecting.
Europa Study Unit
An association of philatelists devoted to the study of philatelic manifestations of the Europa ideal of political, economic, and social
ASCAT
International Association of Publishers of Stamp Catalogues. Official Website: http://ascat-org.com/
Approval Dealers Protection Society (ADPS)
"The ADPS Stamp Dealers Society is a UK based society formed in 1966 for the benefit of both full and
ASDA
Indicates membership of either the American or the Australian Stamp Dealers Association (now known as the Australasian Philatelic Traders' Association
Association of Scottish Philatelic Societies (ASPS)
The history of the Association of Scottish Philatelic Societies stretches back to the first joint meetings of societies in Scotland
Philatelic Federation of South Africa
The Philatelic Federation of South Africa is the primary philatelic association of South Africa. Official website: Philatelic Federation of South