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SIC is the officially obsolete Standard Industrial Classification system. Started in the 1930s, its last and final revision was in 1987. SIC codes are still prevalent in many private and public sector economic and business databases; nevertheless they have been officially replaced by the more service-sector oriented NAICS system.

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North Carolina

... depth. These chasms or "gaps" are more than a thousand feet lower than those of the corresponding parts of the Blue Ridge. The rivers of the second system rise on th ...