Here are photos from his life and career as India's pre-eminent defence scientist and one of the country's most popular president
This Haryana village believes it has 'found' the Saraswati river of the Vedas.
As the news of Kalam broke, condolences and tributes poured in from all corners of the country, reflecting the huge popularity he enjoyed both in and out of the highest office of the country that earned him the sobriquet of the "people's President."
When the universe is your workspace, the sky is the limit, and there's no such thing as a glass ceiling. Divia Thani Daswani meets the women behind Mangalyaan
ISRO's expedition to Mars is yet another breathtaking adventure for an organisation created by Dr Vikram Sarabhai and carefully nurtured by scientists like A P J Abdul Kalam and R Aravamudan.
The facts remain cloaked in mystery, but the legend goes that Talpade had created a flying machine powered by mercury and solar energy, and based on ideas outlined in Vedic texts.
Dr P K Menon, Chief Scientist and CEO, Optimal Synthesis Inc, who worked with Dr A P J Abdul Kalam early on in his career, recalls what it was like working for his first boss.
It came under severe criticism from the CAG on Friday as it pointed out that its Mark-I version has 53 'significant shortfalls'.
A clear aim, knowledge, hard work and perseverance spells success: President Dr A P J Abdul Kalam.