APJ Abdul Kalam received honorary doctorates from 40 universities. The Government of India has honoured him with the Padma Bhushan in 1981 and the Padma Vibhushan in 1990 for his work with ISRO and DRDO and his role as a scientific advisor to the Government. In 1997, Kalam received India's highest civilian honour, the Bharat Ratna, for his immense and valuable contribution to the scientific research and modernisation of defence technology in India.