Other Radio Systems/Groups:

BobCat Amateur Radio Club
Sunset Ridge Repeater Group
Cactus Intertie System
Crossbar Radio Network
Rabbit Radio Network
California Microwave Relay Assosciation
Alum Rock Radio Club
CAL-Net Repeater Group
Los Angeles Unified School District Amateur Radio Association
Sierra Radio Association
Southwest Remote Radio Club
DRØNK Radio Network
DeLuXe Repeater System
Santa Barbara Amateur Radio Club
Ventura County Amateur Radio Society
Sulphur Mountain Repeater Association

Coordination Bodies:

Southern California Repeater and Remote Base Association (SCRRBA)
Two-Meter Area Spectrum Management Association (TASMA)
220 Spectrum Management Association (220SMA)
Northern Amateur Relay Council of California (NARCC)

Equipment Manufacturers:

Pacific Research Solutions, Inc.
Link Communications, Inc.
Computer Automation Technology
Communications Specialists, Inc.
NHRC Repeater Controllers
S-COM Controllers

Other useful Information:

Repeater Builders' Technical Info page
QRZ.COM
Federal Communications Commission
Amateur Radio Relay League
KO6OY's SMRA Swap Page