Information Technology has been the backbone of success of the National Stock Exchange of India Limited (NSE). NSE has been at the forefront in spearheading technological changes in the securities market. It is necessary to focus on Information Technology to retain the primacy in the market. Towards this, a wholly owned subsidiary, namely, NSE Infotech Services Limited (NSETECH) has been incorporated to cater to the needs of NSE and all its group companies, exclusively. In recognition of the fact that technology will continue to redefine the shape of the securities industry, NSETECH stresses on innovation and sustained investment in technology to remain ahead of competition. The various application systems that NSE uses for its trading as well clearing and settlement and other operations form the backbone of the Exchange.