Aerogramme Society
An international philatelic society for the study of world-wide Aerogrammes and Airletter Sheets. Publishes a quarterly newsletter: The AerogrammeR.

American Philatelic Society
The biggest philatelic society in America. It also has the biggest collection of philatelic publications.

Australian Philatelic Federation
This is the on-line home of the Australian Philatelic Federation.

British North America Philatelic Society
Aside from a brief introduction, the site contains only a list of officers and members.

Great Britain Philatelic Society
The society seeks to promote stamp collecting in Great Britain. Publishes the GB Journal .

Historical Document Society
A collection of manuscripts, documents and autographed philatelic memorabilia.