Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Tata Consultancy Services Limited is a software services and consulting company headquartered in Mumbai, India. TCS is the largest provider of information technology and business process outsourcing services in India. The company is listed on the National Stock Exchange and Bombay Stock Exchange of India.TCS is a subsidiary of one of India''s largest and oldest conglomerates, the Tata Group, which has interests in areas such as energy, telecommunications, financial services, manufacturing, chemicals, engineering, materials, government and healthcare.