(12 August 1892 – 27 September 1972) was a mathematician and librarian 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 Library Day in India.