RPS

The Calgary Philatelic Society is Chapter 66 of The Royal Philatelic Society of Canada.  The RPSC is Canada's national society for philatelists and speaks for all Canadian collectors at provincial, federal and international levels of philately.

APS

The Calgary Philatelic Society is Chapter 1360 of the American Philatelic Society.  The APS is the largest, nonprofit society in the world for stamp collectors.  The APS offers a number of services and educational opportunities to broaden your personal collection and enhance your special collecting interests!

ATA

The Calgary Philatelic Society is Chapter 91 of the American Topical Association.  The ATA is the largest philatelic society devoted to this specific area of topical stamp collecting.  

BNAPS

The Calgary Philatelic Society has a regional British North America Philatelic Society study group, which meets the second Wednesday of the month (excluding June, July and August.  The BNAPS studies the Philately of the British Empire holdings and colonies throughout North America