North Carolina has large grazing areas for beef and dairy cattle. Truck farms can be found in North Carolina. A truck farm is a small farm where fruits and vegetables are grown to be sold at local markets. The state's shipping, commercial fishing, and lumber industries are important to its economy. Service industries, including education, health care, private research, and retail trade, are also important. Research Triangle Park, a large industrial complex located in the Raleigh-Durham area, is one of the major centers in the country for electronics and medical research.