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He has remained active in public life since leaving politics, authoring papers and giving speeches on topics related to policy and the economy.
With the passage of the Right to Education Act in 2009, all Indian children now have the fundamental right to an education.
Manmohan Singh, who served as finance minister in 1991, was instrumental in lowering state control, liberalizing India's economy, and ending the Licence Raj.
Manmohan Singh was the first Sikh prime minister of India, serving from 2004 to 2014.
He taught economics at Punjab University and was employed by the UN before going into politics.
He earned his doctorate in economics from Oxford and was a stellar student who consistently placed top in his class.
Born in Gah, West Punjab, in present-day Pakistan, Manmohan Singh's family moved to India in 1947 when the country was divided.