Central Contractor Registration (CCR)
- Database of basic business information for contractors that want to do business with the U.S. Department of Defense (DoD). All contractors must be registered in CCR for contract eligibility.
- http://www.ccr.gov/

Central Basin Municipal Water District
- Central Basin Municipal Water District is a public agency that provides wholesale water and non-potable recycled water to cities, mutual water companies, investor-owned utilities and private companies in southeast Los Angeles County.
- http://www.centralbasin.org

Commerce Business Daily
- U.S. Government's free version of listed Federal procurement information and opportunities.
- http://cbdnet.access.gpo.gov/

U.S. Treasury Bureau
- Business and procurement opportunities for each of the Bureau's six procurement offices.
- http://www.ustreas.gov/procurement/bizopps.html