Library & information sciences 50 Reference, information & interdisciplinary subjects 10 Library, archive & information management 5 Communication studies 3 History 3 Library & information services 3 Acquisitions & collection development 2 Bibliographic & subject control 2 Business strategy 2 Coins, banknotes, medals, seals (numismatics) 2 Economics, finance, business & management 2 Information technology industries 2 Literature: history & criticism 2 Museology & heritage studies 2 Public buildings: civic, commercial, industrial, etc 2 Social & cultural history 2 Architecture: professional practice 1 Biochemical engineering 1 Classical history / classical civilisation 1 Computational linguistics 1 Computer science 1 Education 1 Energy industries & utilities 1 Engineering: general 1 History of engineering & technology 1 Humanities 1 Impact of science & technology on society 1 Law: study & revision guides 1 Literary studies: general 1 Literature & literary studies 1