NAICS and DUNs
NAICS – North American Industry Classification System
(6 digit number used to describe type of business activity)
www.census.gov/epcd/www/naics.html
DUNS – Data Universal Numbering System
(9 digit number issued by Dun & Bradstreet unique to each business)
https://eupdate.dnb.com/requestoptions.asp?cm_re=Homepage*Resources*DUNSNumberLink
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