Tata Consultancy Services Limited (
TCS) is an Indian
multinational information technology (IT)
service,
consulting and business solutions company
headquartered in
Mumbai,
Maharashtra. It is a subsidiary of the
Tata Group and operates in 46 countries. TCS is one of the largest Indian companies by
market capitalization ($80 billion). TCS is now placed among the ‘Big 4’ 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 first Indian company. It is the world's 10th largest IT services provider, measured by the revenues.