Internet Society (ISOC) - I am a pioneer member of the Internet Society. (A "pioneer" member is one who joined when ISOC was initially formed.)
IETF - I have been participating in IETF meetings for more than a decade.
I was co-chair of the IETF's working group on policies and procedures.
California State Bar Association - I am a licensed attorney and have been since 1978.
I am a member of the Intellectual Property Section of the California Bar.
California Trolley and Railroad Corporation - CTRC - http://www.ctrc.org/ - CTRC restores and preserves railroad equipment as it was used to serve the people in Santa Clara Valley, California. CTRC is a 501(c)(3) non-profit California Corporation. I have been a member for a number of years and have occasionally (far too occasionally) been seen helping with the restoration of a 1923 mainline steam locomotive.
TheatreWorks - http://www.theatreworks.org/ - TheatreWorks is one of Northern California's five largest theatre companies. I have worked as a crew member (usually on lighting) on dozens of productions over the last ten years.
InterWorking Labs - http://www.iwl.com/ - InterWorking Labs is engaged in the business of testing the interoperability of Internet protocols, primarily SNMP and RMON.