Tata Consultancy Services Limited (TCS) is an Indian multinational information technology (IT) service and consulting company headquartered in Mumbai, Maharashtra, India. It is a subsidiary of Tata Group and operates in 46 countries. TCS is the second largest Indian company by market capitalization. It is just behind Reliance Industries in term of market value.TCS is now placed among the most valuable IT services brands worldwide. In 2015, TCS is ranked 64th overall in the Forbes World's Most Innovative Companies ranking, making it both the highest-ranked IT services company and the top Indian company. It is the world's 2nd largest IT services provider. As of 2017, it is ranked 10th on the Fortune India 500 list. In April 2018, TCS became the first Indian IT company to breach $100 billion market capitalization,and second Indian company ever (after Reliance Industries achieved it in 2007) after its m-cap stood at Rs 6,79,332.81 crore ($102.6 billion) in Bombay Stock Exchange.