Tata Steel Limited is an Indian multinational steel-making company, based in Jamshedpur, Jharkhand and headquartered in Mumbai, Maharashtra. It is a part of the Tata Group. Formerly known as Tata Iron and Steel Company Limited (TISCO), Tata Steel is among the largest steel producing companies in the world, with an annual crude steel capacity of 35 million tonnes. It is one of the world's most geographically diversified steel producers, with operations and commercial presence across the world.
https://en.wikipedia.org/wiki/Tata_Steel