APJ Abdul Kalam was an Indian scientist and politician who served as the 11th President of India. Some key facts about him include: - He was born in 1931 in Rameswaram, India and worked as a scientist and engineer, making significant contributions to developing India's missile and nuclear programs. - As a scientist, he led efforts to develop ballistic missile and launch vehicle technology in India and worked on important projects like the SLV-III and Agni missile programs. - In 2002, he became the 11th President of India, the highest office in the country. He was known as the "Missile Man of India" for his work on defense research and space science.