S. R. Ranganathan
Shiyali Ramamrita Ranganathan (1892 – 1972) was an Indian librarian and mathematician.
He is known for his five laws of library science and the development of the colon classification, a faceted classification system. Ranganathan is considered the father of library science, documentation, and information science in India. His birthday is celebrated as National Librarian Day in India.
He worked as a university librarian and professor of library science at Banaras Hindu University (1945–47) and at the University of Delhi (1947–55), where he led the first Indian school of library science offering higher degrees.
Reference: S. R. Ranganathan - Wikipedia