Classification
330 - Economics
1,057
320 - Political science
849
610 - Medicine & health
356
820 - English & Old English literatures
242
333 - Economics of land & energy
192
304 - Factors affecting social behavior
185
300 - Social sciences
173
340 - Law
144
004 - Data processing & computer science
139
370 - Education
129
900 - History & geography
119
363 - Other social problems & services
112
005 - Computer programming, programs & data
92
700 - The arts; fine & decorative arts
72
658 - General management
71
006 - Special computer methods
68
577 - Ecology
67
380 - Commerce, communications & transportation
62
338 - Production
61
616 - Diseases
61
620 - Engineering & allied operations
60
306 - Culture & institutions
58
600 - Technology
58
630 - Agriculture & related technologies
58
301 - Sociology & anthropology
47
331 - Labor economics
44
336 - Public finance
44
305 - Social groups
42
551 - Geology, hydrology & meteorology
39
361 - Social problems & social welfare in general
37
100 - Philosophy & psychology
32
621 - Applied physics
32
910 - Geography & travel
30
140 - Specific philosophical schools
29
500 - Natural sciences & mathematics
29
000 - Computer science, information & general works
28
940 - History of Europe
28
200 - Religion
23
371 - Schools & their activities; special education
23
571 - Physiology & related subjects
23
580 - Plants (Botany)
23
364 - Criminology
22
515 - Analysis
22
615 - Pharmacology & therapeutics
21
800 - Literature & rhetoric
21
001 - Knowledge
20
519 - Probabilities & applied mathematics
18
303 - Social processes
17
530 - Physics
17
550 - Earth sciences
17
more ...