Katihar is situated in the eastern regions of the Indian state of Bihar. It functions as the regional headquarter of the Katihar district. It is known all over the eastern part of India for being a highly strategic railway junction. This city belonged to the Purnia district earlier. It is a part of the Mithila region. Katihar has a widespread railway network which connects the city to every other part of the country. It is known for its connectivity to the nooks and corners of the North East via railway and hence it is sometimes called "The Gateway of North-East." The city is located in the interior of Bihar and does not have a good network of roads. Katihar has many renowned educational institutions. Schools like Kendriya Vidyalaya, Ramakrishna Mission and Jawahar Navodaya Vidyalaya have their branches in the city. Quite a few well-known colleges in Katihar offer courses in medical sciences, technology. law and other disciplines. The city has a special inclination towards Movies and Sports. There are many movie theatres and open grounds to support these passions of the residents. The railway junction, which is connected to six different lines, is the main revenue generator for this city. Katihar is also a commercial city with plenty of shops, showrooms and restaurants.
TMB, a private sector bank established in 1921 as Nadar bank, later the name changed to Tamilnad Mercantile Bank in November 1962. The head office of the Tamilnad Bank is at Thoothukudi, Tamil Nadu. The primary objective of founding TMB was to serve the Nadar business community, and the idea was proposed at the annual meeting of Nadar Mahajani Sangam at Tuticorin in 1920. AMMS Chinnamani Nadar found the other founding members of the bank and played a significant role in its formation in 1921. Outside Tamil Nadu, the bank opened its first branch in Bangalore in 1976. The bank had only four offices by 1947: Sivakasi, Tuticorin, Madurai, Virudhunagar. On 9 December 1984, the bank opened its first computerized branch in Tuticorin at WGC road. In 1983, the bank started using modern technologies and was the first to adopt computerization for branch level operations. All the 500 branches of the bank are connected using Infosys FINACLE software. For providing payment gateway services to its internet banking customers, TMB has partnered with Pay U India, Bill Desk, CC Avenue, etc. It is the first bank to provide POS machines and mobile banking to its customers. For connecting Head office with regional offices, the bank has adopted video conferencing facility. For ATM operations, TMB is a member of National Financial Switch.