the world
We Are Scientists was created in 2000.
Federation of American Scientists was created in 1945.
Bulletin of the Atomic Scientists was created in 1945.
Union of Concerned Scientists was created in 1969.
World Association of Young Scientists was created in 2004.
British Atomic Scientists Association was created in 1946.
Association of Los Alamos Scientists was created in 1945.
Association of Orthodox Jewish Scientists was created in 1947.
National Society of Consulting Soil Scientists was created in 1987.
Because that's the kind of thing scientists do. They figure things out, sort them up in an orderly manner. Who's related to who, that kind of thing.
natural world
The Aperture scientists.