American Philatelic Society (APS)
American Topical Society (ATA)
Brookman Accessories
Grandma's Attic
International Machine Cancel Society (IMCS)
Mobile Post Office Society
Northwest Philatelic Library (NPL)
Pacific Northwest Postal History Society (PNWPHS)
Salem Stamp Society (SSS)
Scouts on Stamps Society International (SOSSI)
Stamp Buddies
Oregon Stamp Society
First Stamps (Youth)