Indian Overseas Bank (IOB) is a central public sector undertaking. It is under the ownership of the Ministry of Finance, Government of India. It is based in Tamil Nadu, India, with about 3,214 domestic branches, about 4 foreign branches and representative office. Founded in February 1937 by M. Ct. M. Chidambaram Chettyar with twin objectives of specialising in foreign exchange business and overseas banking, it has created various milestones in Indian Banking Sector. During the nationalisation, IOB was one of the 14 major banks taken over by the government of India. On 5 December 2021, IOB got Degidhan Award 2020–21 by Ministry of Electronics & Information Technology for achieving second highest percentage of digital payment transaction among public sector banks. As on 31 March 2022, IOB's total business stands at ₹417,960 crore (US$52 billion).

Tamil Nadu (; Tamil: [ˈtamiɻ ˈnaːɽɯ] (listen), abbr. TN) is a state in southern India. It is the tenth largest Indian state by area and the sixth largest by population. Its capital and largest city is Chennai. Tamil Nadu is the home of the Tamil people, whose Tamil language—one of the longest surviving classical languages in the world—is widely spoken in the state and serves as its official language. The state lies in the southernmost part of the Indian peninsula, and is bordered by the Indian union territory of Puducherry and the states of Kerala, Karnataka, and Andhra Pradesh, as well as an international maritime border with Sri Lanka. It is bounded by the Western Ghats in the west, the Eastern Ghats in the north, the Bay of Bengal in the east, the Gulf of Mannar and Palk Strait to the south-east, and the Indian Ocean in the south. The at-large Tamilakam region that has been inhabited by Tamils was under several regimes, such as the Sangam era rulers of the Chera, Chola, and Pandya clans, the Pallava dynasty, and the later Vijayanagara Empire, all of which shaped the state's cuisine, culture, and architecture. After the fall of the Kingdom of Mysore, the British colonised the region and administered it as part of the Madras Presidency, headquartered at the city of Madras, now known as Chennai. After India's Independence in 1947, the Madras State came into existence, whose borders were linguistically redrawn by the States Reorganisation Act, 1956, losing territory to Kerala, Karnataka and Andhra Pradesh. The state was renamed as Tamil Nadu in 1969. It is home to a number of historic buildings, multi-religious pilgrimage sites, hill stations and three World Heritage Sites.The economy of Tamil Nadu is the second-largest in India, with a gross state domestic product (GSDP) of ₹24.85 lakh crore (US$310 billion) and has the country's 11th-highest GSDP per capita of ₹225,106 (US$2,800). It ranks 11th among all Indian states in human development index. Tamil Nadu is the most urbanised state in India, and one of the most industrialised states; the manufacturing sector accounts for more than one-third of the state's GDP. Its tourism industry is the largest among the Indian states. The Tamil film industry plays an influential role in the state's popular culture.

Nilgiri, which literally means "Blue Mountain", may refer to: Nilgiri Biosphere Reserve, an International Biosphere Reserve in the Western Ghats and Nilgiri Hills ranges of South India Nilgiri mountains, a range of mountains spanning the states of Tamil Nadu and Kerala in Southern India The Nilgiris District, a region of the Indian state of Tamil Nadu Nilgiri tea, a dark intensely aromatic and flavourful tea grown around the Nilgiris in Tamil Nadu and Kerala in Southern India Nilagiri or Nilgiri, a town in Balasore District of the state of Odisha in East India Nilgiri (Odisha Vidhan Sabha constituency), Assembly constituency of Odisha, India Nilgiris (supermarket), supermarket chain in South India Nilgiri Himal, a range of three peaks in the Annapurna region in Nepal INS Nilgiri (F33) class frigate Nilgiri, a hill resort in the Bandarban District of Bangladesh