<P> Leading industries in San Diego--Tijuana are trade, services, electronics, tourism, life sciences, high - tech and defense sectors . In 2002 San Diego and Tijuana had a gross regional product of $136.3 Billion; and in 2007 this figure increased to $176 Billion . The greater San Diego area has a knowledge - based economy that is only growing; Tijuana's sub-metropolitan region is reliant on a diversified manufacturing sector . Leading private employers to the metropolitan region are Qualcomm, SAIC, Sempra Energy, Sony, Kyocera, Pfizer Global Research & Development, Callaway Golf, Sharp Healthcare, Scripps Health, Sanyo, Hitachi, Panasonic Corporation, Samsung, Hyundai, Mattel, Honeywell, Pioneer Corporation, Maxell, Douglas Furniture, and International Rectifier . </P> <P> The economy of the urban area is influenced by the Port of San Diego which gives the region a strong maritime sector; the conurbation is the location of the only major submarine and shipbuilding yards on the West Coast and of the largest naval fleet in the world . The cruise ship industry, which is the second largest in the California - Baja California region, generates an estimated $2 million annually from the purchase of food, fuel, supplies, and maintenance services . In California alone, the port is the fastest - growing port in terms of cruise ship dockings and the second largest behind the Port of Los Angeles . </P> <P> Manufacturing accounts for a large part of the regional economy more - so observed in Tijuana . The focus of manufacturing in the region is on soft and hard technological products . In metropolitan Tijuana, manufacturing has historically allotted for a large sector of the economy and San Diego County's economy has increasingly focused on manufacturing which 2002 allotted for $25 billion of the county's economic income . The 2000s decade saw Tijuana overtake the Twin Cities as medical device manufacture capital of North America . The amount of diverse and numerous manufacture companies in the area have made the metropolitan region one of the world's largest concentrated manufacturing areas . </P> <P> San Diego--Tijuana is ground zero for a transborder tech sector . Engineers and entrepreneurs in the entirety of the border region are fueling the growth of this economic industry in which a symbiotic relationship exists between think - tanks in the north and manufacturing heads in the south that creates a healthy environment for startup companies . San Diego alone was rated by Forbes in 2014 as one of the best places to start a tech company . </P>

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