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This paper drawing data from a comparative study of use of Online Public Access Catalogue (OPAC) and card catalogue of ISRO Satellite Centre (ISAC) library examines the steady decline in use of subject searching by end-users and the associated problems and issues; presents data to highlights negligible use of Boolean operators and combination searches, variations in descriptors assigned to books of the same class numbers, too many records tagged too broad descriptors, etc.; Concludes thatdoi:10.1108/10650750410564691 fatcat:hksywhmtw5bv7nybkjadyjwshu