This class includes the activities of associations whose members are mainly employees interested chiefly in the representation of their views concerning the work situation and in concerted action through organization. This involves the activities of unions of professional, technical, cultural and farm workers and of government employees and the activities of single plant unions, of unions composed of affiliated branches and of labour organizations composed of affiliated unions on the basis of trade, region, organizational structure or other criteria.

Exclusions: Publication of newspapers, journals, etc., by these organizations is classified in the appropriate class of group 221 (Publishing).

Education provided by these organizations is classified in the appropriate categories of division 80 (Education).