Subject
Science
2,576
Medicine
2,073
Technology
1,217
Social Sciences
1,171
Engineering (General). Civil engineering (General)
799
Public aspects of medicine
792
Mathematics
777
Physics
Philosophy. Psychology. Religion
591
Geography. Anthropology. Recreation
511
Sociology (General)
500
Psychology
498
Economic theory. Demography
497
General Works
493
History of scholarship and learning. The humanities
492
Environmental sciences
477
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
272
Commerce
254
Finance
173
Instruments and machines
143
Information technology
122
Law
119
Materials of Engineering and Construction. Mechanics of Materials
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
48
Probabilities. Mathematical statistics
48
Social sciences (General)
38
Law in general. Comparative and uniform law. Jurisprudence
34
Religions. Mythology. Rationalism
30
more ...