The Other Backward Class (OBC) is a collective term used by the Government of India to classify communities that are "educationally or socially backward". It is one of several official classifications of the population of India, along with general castes, Scheduled Castes and Scheduled Tribes. The OBCs were found to comprise 52% of the country's population by the Mandal Commission report of 1980 and were determined to be 41% in 2006 when the National Sample Survey Organisation took place. There is substantial debate over the exact number of OBCs in India; it is generally estimated to be sizable, but many believe that it is higher than the figures quoted by either the Mandal Commission or the National Sample Survey.