Activities of membership organisations Standard Industrial Classification (SIC) codes of UK-based importers and exporters 94110 - Activities of business and employers membership organizations (5171) 94120 - Activities of professional membership organizations (5779) 94200 - Activities of trade unions (911) 94910 - Activities of religious organizations (8093) 94920 - Activities of political organizations (865) 94990 - Activities of other membership organizations n.e.c. (16352)