North American Industry Classification System (NAICS) has been in effect since 1997 in Canada and the United States. It was developed to provide a consistent frame-work for the collection, analysis, and dissemination of industrial statistics used by government policy analysts, academics and researchers, the business community, and the public. The fundamental principle of NAICS is that producing units that use similar production processes should be grouped together and are assigned to each establishment of an enterprise based on the primary activity of that establishment. Statistics compiled on NAICS are comparable with statistics compiled according to the latest revision of the United Nations’ International Standard Industrial Classification (ISIC, Revision 3) for some 60 high level groupings. Oregon Workers’ Compensation Division uses these codes in association with workers’ compensation claims.