The Hindustan Aeronautics Limited (HAL) was established in 1964 by merging two Indian aircraft companies. It is engaged in the design, development, manufacture, repair and overhaul of aircraft, helicopters, engines and accessories. HAL has 19 production units and 10 research and design centres across India, with its headquarters in Bangalore. It has manufactured 15 types of aircraft/helicopters domestically and produced 14 under license. HAL exports to over 30 countries and has set a target to manufacture 1,500 helicopters by 2021. It faces challenges related to manpower training and keeping production lines up to date with technology.