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<p>establishments.</p>

<p><big>Codes</big></p>
<p>The NAICS numbering system employs a five or six-digit code at the most detailed industry level. The first five digits are generally (although not always strictly) the same in all three countries. The first two digits designate the largest business sector; the third digit represents the subsector; the fourth digit represents the industry group; the fifth digit designates the NAICS <a href="page.php?w=Industry_%28economics%29">industries</a>, and the sixth digit represents the national <a href="page.php?w=Industry_%28economics%29">industries</a>.</p><p>
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