ARSC: Association for Recorded Sound Collections Save
A non-profit association of those interested in the history and technology of recorded sound.
http://www.arsc-audio.org/   

Rock Record Collectors Association (RRCA) Save
Organization dedicated to the collection, preservation and promotion of rock music (particularly hard rock) from all eras and in all formats.
http://www.diskery.com/rrca/   

Help build the largest human-edited directory of the web
Suggest a site | Open Directory Project | Become an editor