Remembering APJ Abdul Kalam on his 89th birth anniversary: 5 scientific contributions by 'Missile Man'

From being the people's President to spearheading the development of the most significant Indian missiles, late President Dr. APJ Abdul Kalam has contributed to the development of the country in different spheres. As an aerospace scientist, Kalam worked with India's two major space research organisations - Defence Research and Development Organisation (DRDO) and Indian Space Research Organisation (ISRO).

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