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Government NAICS Codes
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541611 - Administrative & General Management
541612 - Human Resources & Executive Search
561310 - Employment Placement
561320 - Temporary Help
561450 - Background Screening & Investigation Services
624310 - Job Training

The North American Industry Classification System (NAICS) is the standard used by Federal statistical agencies in classifying business establishments for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. business economy.
NAICS was developed under the auspices of the Office of Management and Budget (OMB), and adopted in 1997 to replace the Standard Industrial Classification (SIC) system. It was developed jointly by the U.S. Economic Classification Policy Committee (ECPC), Statistics Canada This link to a non-federal Web site does not imply endorsement of any particular product, company, or content., and Mexico's Instituto Nacional de Estadistica y Geografia This link to a non-federal Web site does not imply endorsement of any particular product, company, or content., to allow for a high level of comparability in business statistics among the North American countries.
This official U.S. Government Web site provides the latest information on plans for NAICS revisions, as well as access to various NAICS reference files and tools.
The official 2012 U.S. NAICS Manual includes definitions for each industry, background information, tables showing changes between 2007 and 2012, and a comprehensive index. The official 2016 U.S. NAICS Manual is available in print and on CD-ROM from the National Technical Information Service (NTIS) at (800) 553-6847 or (703) 605-6000, or through the Previous versions of the NAICS Manual are available.
Additional information on the background and development of NAICS is available in the of this Web site.

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