As you have asked about the official website of the Indian Institute of Science (IISc), I am giving you information about it, check below for the details

Website:
iisc.ernet.in/



On its homepage you will come across following sections:

Spotlight
Latest News
Upcoming Events

It has following menus:

ABOUT IISc
ACADEMICS
ADMINISTRATION
ADMISSIONS
FACULTY CORNER
STUDENTS CORNER
RESOURCES
OPPORTUNITIES

Contact:
Indian Institute of Science
Address:
C V Raman Ave, Bengaluru,
Karnataka 560012
Phone:080 2293 2004