Re-issued in a more user-friendly format, this practical manual gives clear advice on deriving the National Statistics Socio-Economic Classification (NS-SEC), an occupation-based government classification developed by the Economic and Social Research Council on behalf of the Office for National Statistics. By looking at social relationships in the work place, NS-SEC identifies the different positions - rather than the people - that exist within the labour market. Rebased to take account of the revised and updated Standard Occupational Classification 2000, it measures employment relations and conditions of occupation, both of which are vital in analysing the structure of socio-economic positions of modern societies. The National Statistics Socio-Economic Classification: User Manual is an invaluable tool for social researchers working with NS-SEC or anyone seeking to explain variations in social behaviour and other social phenomena.