Description: (Indian Mathematician and Librarian Known for His Development of 'Colon Classification')
S. R. Ranganathan was an Indian librarian and mathematician. Ranganathan is best remembered for developing the colon classification, a system of library classification, which is currently used in research libraries all over the world. In India, he is considered the father of library science, information science, and documentation. His birthday is observed as National Librarian's Day in his home country.