Los Angeles Perl Mongers
- user group for the Perl programming language
- http://losangeles.pm.org/

SGVLUG
- San Gabriel Valley Linux Users Group (Altadena)
- http://www.sgvlug.org/

MacValley Users Group
- Northridge, CA. Offers information on meetings, becoming a member, links, and hands-on seminars.
- http://www.macvalley.org/

CLUG
- Cerritos Linux Users Group.
- http://www.cerritoslug.org/

Raytheon/Hughes Mac Users Group
- A corporate Yahoo users group with message board and mailing list.
- http://groups.yahoo.com/group/MacHACers/

HIDACC Apple Computer Club
- Lancaster, CA. Includes newsletter, meeting schedule, software library, and member resources.
- http://www.hidacc.av.org/

Southern California Macintosh Owners/Users Group
- SMOG offers meeting minutes and schedules, membership information, and useful links.
- http://www.ocmug.org/

Simi-Conejo Linux User's Group
- Linux Users Group for the Simi and Conejo Valleys in Southern California.
- http://www.sclug.org/

CVMUG
- Simi Valley, CA. Bookstore, calendar, links, meeting, message board, news, reviews, and tutorials.
- http://www.cvmug.org/

Los Angeles Java Users' Group (LAJUG)
- Includes meeting history, directions, mailing list signup, and job listings.
- http://www.lajug.org/

Los Angeles Palm/Portable Users Group
- Meeting notes and mailing list.
- http://www.lapug.com/

Los Angeles Macintosh Group
- Community overview, including forum access.
- http://www.lamg.org/

USCLUG
- University of Southern California Linux Users Group.
- http://sclug.usc.edu/

San Gabriel Valley Mac Users Group
- Pasadena, CA. Includes mailing lists, special interest groups, links, and membership information
- http://www.sgvmug.org/

LULA
- Linux Users of Los Angeles.
- http://www.lula.org/

Los Angeles Linux User Groups
- Umbrella site for all Los Angeles Linux User groups. Links and information about upcoming events.
- http://www.lalugs.org/

Thousand Oaks Personal Computer Club
- This California, USA, based club is open to all people, young and old, from beginners to advanced. Meeting information and contact details.
- http://topcc.org/mainpage.html

Southern California Wireless Users Group
- Wireless users group in California, USA, with a focus on data communications using wireless technology. Contact and meeting information, streaming video archive of meetings and presentations.
- http://www.socalwug.org/

ASP Developers' Special Interest Group
- ASP user group in Los Angeles, California.
- http://asp.sig.lax.webpublishing.com