Activities of membership organisations Standard Industrial Classification (SIC) codes of UK-based importers and exporters 94110 - Activities of business and employers membership organizations (4919) 94120 - Activities of professional membership organizations (5471) 94200 - Activities of trade unions (823) 94910 - Activities of religious organizations (7708) 94920 - Activities of political organizations (803) 94990 - Activities of other membership organizations n.e.c. (15079)