Classification
330 - Economics
1,055
320 - Political science
840
610 - Medicine & health
350
820 - English & Old English literatures
242
333 - Economics of land & energy
186
304 - Factors affecting social behavior
184
300 - Social sciences
162
340 - Law
140
004 - Data processing & computer science
139
370 - Education
125
363 - Other social problems & services
109
900 - History & geography
109
005 - Computer programming, programs & data
90
658 - General management
71
577 - Ecology
70
006 - Special computer methods
68
700 - The arts; fine & decorative arts
65
616 - Diseases
63
338 - Production
62
620 - Engineering & allied operations
60
306 - Culture & institutions
58
380 - Commerce, communications & transportation
58
630 - Agriculture & related technologies
58
600 - Technology
57
331 - Labor economics
44
336 - Public finance
43
301 - Sociology & anthropology
42
305 - Social groups
42
551 - Geology, hydrology & meteorology
38
361 - Social problems & social welfare in general
35
621 - Applied physics
32
500 - Natural sciences & mathematics
30
910 - Geography & travel
30
140 - Specific philosophical schools
29
940 - History of Europe
28
000 - Computer science, information & general works
25
100 - Philosophy & psychology
25
371 - Schools & their activities; special education
23
571 - Physiology & related subjects
23
580 - Plants (Botany)
23
200 - Religion
22
515 - Analysis
22
364 - Criminology
21
615 - Pharmacology & therapeutics
21
800 - Literature & rhetoric
20
001 - Knowledge
18
519 - Probabilities & applied mathematics
18
303 - Social processes
17
530 - Physics
17
550 - Earth sciences
17
more ...