ISRO have so many launch vehicles till date they have. 

They have PSLV (Polar Satellite Launch Vehicle), GSLV (Geosynchronous Satellite Launch Vehicle), GSLV MK 3 (Geosynchronous Satellite Launch Vehicle Mark 3), SSLV (Small Satellite Launch Vehicle)

Everyone has different work and different prospective. Like this ISRO has aslo several mission for different work.

ISRO is doing a great job day by day making good contact…

If you want to know just keep checking the sites and official work of ISRO