 SIC codes identify what a business does.Over time there have been several different SIC systems used in the UK, with versions published in 1958, 1968, 1980, 1992, 1997, 2003 and 2007.These taxonomies have been adapted to cope with the changes in UK industry, The 1980 system was far more detailed in manufacturing, while the 2007 system is much stronger in the IT sector.