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)