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National Technology Day: 6 Big Inventions by Indians

Indian government officially declared 11 May as National Technology Day in India to commemorate the first of the five nuclear tests that were carried out on 11 May 1998. Let's look at big inventions by Indians on this special occasion.
krishna murthy
Zero: Zero and its operation are first defined by Hindu astronomer and mathematician Brahmagupta in 628.
Ornamental Button: Made from seashell, it was used in the Indus Valley Civilisation for ornamental purposes by 2000 BCE. The earliest known being found at Mohenjo-daro in the Indus Valley.
Chess: The history of chess can be traced back nearly 1500 years to its earliest known predecessor, called chaturanga, in India. The game evolved roughly into its current form by about 1500 CE.
Plastic and brain Surgery: Sushruta was an ancient Indian physician and world"s first surgeon known as “Father of Surgery” and “Father of Plastic Surgery” or "father of brain surgery" for inventing and developing surgical procedures.
Water on Moon: ISRO discovered water on the moon with Chandrayaan-1.
Wireless Telecommunication: Sir Jagadish Chandra Bose, who was born on November 30, 1858 in British India's Bengal Presidency, invented wireless telecommunication.