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Ganesh Bhattacharyya

Ganesh Bhattacharyya developed POstulate based Permuted Subject Indexing (POPSI)- a pre- coordinate indexing system at the Documentation Research and Training Centre (DRTC), Bangalore in 1979 and appeared in the article "POPSI: Its Fundamentals and Procedure Based on a General Theory of Subject Indexing Languages". The term "classaurus" means an indexing language/tool that combines classification and thesaurus, first introduced by G. Bhattacharyya in 1982 in the article “Classaurus : its fundamentals, design and use” for POPSI indexing system.