Some of the important space centres of ISRO are Satish Dhawan Space Centre, Vikram Sarabhai Space Centre (VSSC), Space Application Centre (SAC), Liquid Propulsion Systems Centre (LPSC) etc. You can read about the Indian Space Research Organisation [ISRO Notes for UPSC] in the given link.

Further readings:

1. GSLV Mk III – A Comprehensive Overview of Medium Lift Launch Vehicle
2. Mars Orbiter Mission (MOM) – A Complete Overview of Mangalyaan Mission