11 May is celebrated as National Technology Day to mark India’s successful nuclear tests in 1998.
Here are India’s top 10 achievements in science and technology:
Fibre optics - 1960
Narinder Singh Kapany, born in Punjab, invented fibre optics, now used to transmit high-speed internet worldwide.
PARAM 8000 - 1991
PARAM 8000 supercomputer developed for low cost of $10 million, was 2nd-fastest in the world.
USB - 1996
Ajay Bhatt, born in Gujarat, invented the widely used USB standard.
EVMs - 2004
EVMs became the standard for voting across the country, reducing both the time taken to vote and declare results.
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BrahMos - 2006
BrahMos missile, co-developed with Russia, entered into Indian Navy service. It is still the world's fastest anti-ship cruise missile.
Chandrayaan-1 - 2008
Chandrayaan-1 becomes India’s first unmanned space mission to the moon.
Mars Orbiter - 2013
The Mars Orbiter Mission, or Mangalyaan, made India the first Asian nation to reach Martian orbit, and first nation to do so on first attempt.
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KalamSat - 2017
18-year-old Rifath Sharook from Tamil Nadu developed world’s smallest satellite weighing 64g. It was flown into space by NASA.
Most satellites ever - 2017
ISRO launched 104 satellites on PSLV-C37, world record for highest satellites launched in a single mission.
Atomic clock - 2018
ISRO developed an atomic clock, used for navigation satellites. Only 400 such clocks exist in the world.