Defence Research & Development Organisation (DRDO) is an agency under the Ministry of Defence. Headquartered in New Delhi, DRDO was formed in 1958 by amalgamating the Defence Science Organisation and a few technical development establishments. DRDO is India's largest research organisation. It has a network of laboratories engaged in developing defence technologies covering various fields, like aeronautics, armaments, electronics, land combat engineering, life sciences, materials, missiles, and naval systems.
DRDO's first project for the Indian military was in surface-to-air missiles (SAM) known as Project Indigo. However, it received little success and was therefore discontinued. Since being set up, DRDO has achieved many successes in developing major systems and critical technologies like aircraft avionics, UAVs, small arms, artillery systems, EW Systems, tanks and armoured vehicles, sonar systems, command and control systems and missile systems.