TCS stands for Tata Consultancy Services, which is an Indian multinational information technology services and consulting company headquartered in Mumbai. It operates in 150 locations across 46 countries and is a major player in the IT space, with a large portfolio of products and services. TCS is a subsidiary of Tata Sons, a major Indian holding company that owns shares in many large Indian companies.

It is important to note that TCS can also stand for other things, such as the Traction Control System in a car or Time/Temperature Control for Safety (TCS) Food.