| Calif. | California US-Bundesstaat |
| USC | University of Southern California |
| UCI | University of California at Irvine |
| UCD | University of California at Davis |
| UCB | University of California at Berkeley, USA |
| UCR | University of California at Riverside |
| CIT | California Institute of Technology |
| CIT | California Institute of Technology |
| UCLA | University of California at Los Angeles, USA |
| UCSD | University of California at San Diego, USA |
| UCSF | University of California at San Francisco, USA |
| CALTECH | California Institute of Technology |
| CAS | California Academy of Sciences San Francisco, [CA], http://www.calacademy.org |
| UCSC | University of California at Santa Cruz, USA |
| CARB | California Air Resources Board [engl.] Amerikanische Umweltschutzbehörde, stellt u.a. Standards auf |
| SCCS | Southern California Computer Society |
| CBR | California Bearing Ratio [engl.] |
| UCSB | University of California at Santa Barbara, USA |
| CFRI | California Federation of Research Internets |
| Bull. Calif. Agric. Exp. Stn. | Bulletin of the California Agricultural Experiment Station Zeitschrift |
| CERF | California Education and Research Federation [network] |
| CCOF | California Certified Organic Farmers [engl.] US-Prüfstelle für ökologischen Landbau |
| CCIT | California Council for International Trade [engl.] |
| JR | Aero California [IATA-Airline-Code/ Mexiko] |
| ISI | Information Sciences Institute of the University of Southern California Marina del Rey, CA, http://www.isi.edu |