- CLUG - Cerritos Linux Users Group.
- HIDACC Apple Computer Club - Lancaster, CA. Includes newsletter, meeting schedule, software library, and member resources.
- Los Angeles Java Users' Group (LAJUG) - Includes meeting history, directions, mailing list signup, and job listings.
- Los Angeles Linux User Groups - Umbrella site for all Los Angeles Linux User groups. Links and information about upcoming events.
- Los Angeles Macintosh Group - Community overview, including forum access.
- Los Angeles Palm/Portable Users Group - Meeting notes and mailing list.
- Los Angeles Perl Mongers - user group for the Perl programming language
- LULA - Linux Users of Los Angeles.
- MacValley Users Group - Registered Apple MacIntosh users group in the San Fernando Valley, meeting in Northridge. Includes information on meetings, seminars, becoming a member.
- Raytheon/Hughes Mac Users Group - A corporate Yahoo users group with message board and mailing list.
- San Gabriel Valley Mac Users Group - Pasadena, CA. Includes mailing lists, special interest groups, links, and membership information
- SGVLUG - San Gabriel Valley Linux Users Group (Altadena)
- Simi-Conejo Linux User's Group - Linux Users Group for the Simi and Conejo Valleys in Southern California.
- Southern California Macintosh Owners/Users Group - SMOG offers meeting minutes and schedules, membership information, and useful links.
- 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.
- 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.
