The document provides details about Ratan Tata and the Tata Group. It mentions that Ratan Tata has been the Chairman of Tata Sons, the promoter company of the Tata group, since 1991. During his tenure, the group's revenues have grown significantly and it now has operations in over 80 countries across six continents. The Tata Group comprises over 90 operating companies in seven business sectors including communications, engineering, materials, services, energy, and consumer products.