Book excerpt: This is a FULL-size (8.5" x 11") current edition of The North American Industry Classification System (NAICS) which represents a continuing cooperative effort among Statistics Canada, Mexico's Instituto Nacional de Estadística y Geografía (INEGI), and the Economic Classification Policy Committee (ECPC) of the United States, acting on behalf of the Office of Management and Budget, to create and maintain a common industry classification system. This jointly updated the system of classification of economic activities that makes the industrial statistics produced in the three countries comparable. The North American Industry Classification System (NAICS) revision for 2022 went into effect for reference year 2022 in Canada and the United States, and 2023 in Mexico. NAICS was originally developed to provide a consistent framework for the collection, analysis, and dissemination of industrial statistics used by government policy analysts, by academics and researchers, by the business community, and by the public. Revisions for 2022 were made to account for our rapidly changing economies. Classifications serve as a lens through which to view the data they classify. NAICS was developed in accordance with a single principle of aggregation, the principle that producing units that use similar production processes should be grouped together. Though NAICS differs from other industry classification systems, the three countries continue to strive to create industries that do not cross two digit Division boundaries of the United Nations' International Standard Industrial Classification of All Economic Activities (ISIC). The actual classification reveals only the tip of the work carried out by dedicated staff from INEGI, Statistics Canada, and U.S. statistical agencies. It is through their efforts, painstaking analysis, and spirit of accommodation that NAICS serves as a harmonized international classification of economic activities in North America.