Dr. Shiyali Ramamrita Ranganathan (S.R.R.) (listen (help·info) 12 August 1892 – 27 September 1972) was a librarian and mathematician from India. 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. He was a university librarian and professor of library science at Banaras Hindu University (1945–47) and professor of library science at the University of Delhi (1947–55). The last appointment made him director of the first Indian school of librarianship to offer higher degrees. He was president of the Indian Library Association from 1944 to 1953. In 1957 he was elected an honorary member of the International Federation for Information and Documentation (FID) and was made a vice-president for life of the Library Association of Great Britain
Ranganathan, born on 9 August 1892(Real) to Ramamrita, in Siyali (at present, Sirkazhi) in British-ruled India at Tanjavoor (at present, Ubayavethanthapuram, Thiruvarur District), Tamil Nadu. His birth date is also written 12 August 1892 but he himself wrote his birth date 9 August 1892 in his book, The Five Laws of Library Science.
Ranganathan began his professional life as a mathematician; he earned B.A. and M.A. degrees in mathematics from Madras Christian College in his home province, and then went on to earn a teaching license. His lifelong goal was to teach mathematics, and he was successively a member of the mathematics faculties at universities in Mangalore, Coimbatore and Madras. As a mathematics professor, he published papers mainly on the history of mathematics. His career as an educator was somewhat hindered by stammering (a difficulty he gradually overcame in his professional life). The Government of India awarded Padmashri to Dr. S.R. Ranganathan in 1957 for valuable contributions to Library Science.
Source : HathiTrust Digital Library