The National Stock Exchange (NSE) is India's leading stock exchange covering various cities and towns across the country. NSE was set up by leading institutions to provide a modern, fully automated screen-based trading system with national reach.
NSE has a market capitalisation of more than US$1.5 trillion and Number of securities (equities segment) available for trading are 3,091 as on June 2014.
More than 5000 companies are listed on BSE, making it the world's top exchange in terms of listed members. The companies listed on BSE Ltd. command a total market capitalization of USD 1.51 Trillion as of May 2014. It is also one of the world's leading exchanges (3rd largest in March 2014) for Index options trading (Source: World Federation of Exchanges).
http://www.nseindia.com/global/content/about_us/about_us.htm
http://en.wikipedia.org/wiki/National_Stock_Exchange_of_India