The Indian Institutes of Technology (IIT) are autonomous public institutes of higher education, located in India. They are governed by the Institutes of Technology Act, 1961 which has declared them as institutions of national importance and lays down their powers, duties, and framework for governance etc.
There are 23 IITs in India, namely

IIT Kharagpur
For the link to the admission details ,
click here.
Short name : IITKGP
Location : West Bengal
The link to the brochure : Rules & Regulations

IIT Bombay
Short name : IITB
Location : Maharashtra
NIRF Ranking : 3

IIT Madras
Short name : IITM
Location : Tamil Nadu
NIRF Ranking : 2

IIT Kanpur
Short name : IITK
Location : Uttar Pradesh

IIT Delhi
Short name : IITD
Location : Delhi
NIRF Ranking : 4

IIT Guwahati
Short name : IITG
Location : Assam

IIT Roorkee
Short name : IITR
Location : Uttarakhand

IIT Ropar
Short name : IITRPR
Location : Punjab

IIT Bhubaneswar
Short name : IITBBS
Location : Odisha

IIT Gandhinagar
Short name : IITGN
Location : Gujarat

IIT Hyderabad
Short name : IITH
Location : Telanagana

IIT Jodhpur
Short name : IITJ
Location : Rajasthan

IIT Patna
Short name : IITP
Location : Bihar

IIT Indore
Short name : IITI
Location : Madhya Pradesh

IIT Mandi
Short name : IITMandi
Location : Himachal Pradesh

IIT BHU (Varanasi)
Short name : IIT BHU
Location : Uttar Pradesh

IIT Palakkad
Short name : IITPKD
Location : Kerela

IIT Tirupati
Short name : IITTP
Location : Andhra Pradesh

IIT Dhanbad
Short name : IIT(ISM)
Location : Jharkhand

IIT Bhilai
Short name : IITBH
Location : Chhattisgarh

IIT Goa
Short name : IITGOA
Location : Goa

IIT Jammu
Short name : IITJM
Location : Jammu & Kashmir

IIT Dharwad
Short name : IITDH
Location : Karnataka