Context: Recently, DRDO celebrated the 66th Foundation Day of its establishment.
Defence Research and Development Organisation (DRDO)
oProject Indigo: DRDO's initial venture into surface-to-air missiles faced limited success and was subsequently discontinued.
oRustom 2 - Heavy-Duty Drone: In 2016, DRDO successfully tested its first indigenously developed heavy-duty drone, Rustom 2, designed as an unmanned armed combat vehicle similar to the US's Predator drone.
oINS Arihant - Nuclear Ballistic Missile Submarine: DRDO played a key role in co-developing INS Arihant, India's first nuclear ballistic missile submarine, which became operational in 2018.