I am afraid to answer. I am sure BZ will come up later and tell me that if I list the association I either belong to or people I know I might be giving my resume.
Seriously, you can also look on your personal page (IHSA) and there is a list of associations on the lower left side of the page. A couple of people here are members of the very first association listed. But there are many people that belong to more than one as well.
Peace