This was India's first experimental satellite launch vehicle, which made its debut in 1980.
Developed as a more advanced version of the SLV, the ASLV first flew in 1994.
The PSLV is one of India's most successful rockets and has been used for a variety of missions, including launching satellites into polar orbits.
The GSLV is used to launch heavier payloads into geosynchronous transfer orbits. Its first flight was in 2001.
It is designed to carry heavier payloads into higher orbits and was used for the Chandrayaan-2 mission