Science 2,585 Medicine 2,074 Technology 1,222 Social Sciences 1,171 Engineering (General). Civil engineering (General) 800 Public aspects of medicine 792 Mathematics 777 Physics 758 Philosophy. Psychology. Religion 591 Geography. Anthropology. Recreation 512 Sociology (General) 500 Psychology 498 Economic theory. Demography 497 General Works 493 History of scholarship and learning. The humanities 492 Environmental sciences 478 Education 399 Education (General) 397 Biology (General) 394 Fine Arts 375 Arts in general 371 Business 333 Political science 316 Electronic computers. Computer science 300 Chemistry 282 Commerce 254 Finance 173 Instruments and machines 143 Information technology 122 Materials of Engineering and Construction. Mechanics of Materials 121 Law 119 Agriculture 110 Language and Literature 105 History 76 International relations 75 Political science (General) 75 Nutrition. Foods and food supply 72 Philosophy (General) 71 Home economics 66 Information technologyy 64 Management. Industrial management 64 Criminology 55 Social pathology. Social and public welfare. Criminology 55 History (General) 54 Communication. Mass media 50 Applied mathematics. Quantitative methods 49 Probabilities. Mathematical statistics 48 Social sciences (General) 38 Law in general. Comparative and uniform law. Jurisprudence 34 Religions. Mythology. Rationalism 30 more ...