The Full form of NSSO is National Sample Survey Office. It is an organization under the Ministry of Statistics and Programme Implementation of the Government of India. The National Sample Survey Office (NSSO) is headed by a Director General who is responsible for conducting large scale sample surveys in various fields on all India basis. In India, NSSO is the largest organization conducting regular socio-economic surveys and nationwide sample surveys on various socio-economic issues in different rounds, each round covering subjects of current interest in a specific survey period. The NSSO has four divisions namely Survey Design and Research Division (SDRD), Field Operations Division (FOD), Data Processing Division (DPD) and Co-ordination & Publication Division (CPD).