Write classifications in full the first time they are mentioned in each section and then use the abbreviation. When numbers or dates are part of the abbreviation, avoid using brackets and give the year in full.

Standard Industrial Classification 2007: SIC 2007
Standard Occupational Classification 2010: SOC 2010
National Statistics Socio-economic Classification: NS-SEC
Statistical classification of products by activity 2008: CPA 2008
National Statistics Country Classification: NSCC
Nomenclature of Units for Territorial Statistics: NUTS1, NUTS2, NUTS3

For SIC and SOC, insert “UK” the first time they are mentioned if you need to stress that it is UK-specific. “UK” does not need to be repeated if the meaning is clear.

UK SIC 2007