Chemistry 12 Technology: general issues 12 Analytical chemistry 9 Constitutional & administrative law 9 Literature & literary studies 9 Society & social sciences 9 Literature: history & criticism 8 Environmental science, engineering and technology 7 General and world history 7 History 6 Music 6 Research & information: general 6 Theatre studies 6 Medicine and Nursing 5 Physical chemistry 5 Sociology 5 linguistics 5 Biography and non-fiction prose 4 Economics 4 History of engineering and technology 4 History: specific events & topics 4 Neurosciences 4 Physics 4 Psychiatry 4 Surgery 4 Architecture 3 Archiving, preservation & digitisation 3 Bibliographic & subject control 3 Dance 3 Economic history 3