APJ Abdul Kalam dedicated his career as a scientist and a science administrator mainly at DRDO and ISRO . He was well known as the Missile Man of India . He first designed a small hovercraft . Then he was the project director of India's first satellite launch vehicle which successfully developed the Rohini satellite. His both PSLV and SLV III projects were successful .Apart from his He was a former President of india also known as People's president .