Rancho Bernardo sets the standard for master-planned communities. Although part of the City of San Diego, the ambiance of the community distinguishes Rancho Bernardo from other parts of the county.Nestled within a valley, about 7,000 acres house more than 45,000 residents in North County San Diego.A town plaza contains small businesses including financial services, insurance, attorneys, computer services, real estate, mortgage and escrow companies, high tech and entrepreneurial-type businesses. Industry giants such as Sony Electronics, Hewlett-Packard, Northrop Grumman, BAE Systems, NCR Corporation, SAIC, and Eastman Kodak Co. operate in one of the largest business parks in San Diego.