1892 – September, 27, 1972.
Siyali Ramamrita Ranganathan (S.R.R.) (About this soundlisten (help·info) 09 August 1892 – 27 September 1972) was a mathematician and librarian from India. His birth date is also written 12 August 1892 but he himself wrote his birth date 09 August 1892 in his book "five laws of library science". His most notable contributions to the field were his five laws of library science and the development of the first major faceted classification system, the colon classification. He is considered to be the father of library science, documentation, and information science in India and is widely known throughout the rest of the world for his fundamental thinking in the field. His birthday is observed every year as the National Librarian's Day in India.
Also known as