Classification
330 - Economics
816
320 - Political science
371
370 - Education
321
304 - Factors affecting social behavior
292
610 - Medicine & health
277
333 - Economics of land & energy
256
006 - Special computer methods
255
658 - General management
251
005 - Computer programming, programs & data
247
004 - Data processing & computer science
193
363 - Other social problems & services
192
306 - Culture & institutions
171
900 - History & geography
154
551 - Geology, hydrology & meteorology
148
300 - Social sciences
136
338 - Production
130
340 - Law
126
301 - Sociology & anthropology
112
331 - Labor economics
111
577 - Ecology
111
305 - Social groups
106
700 - The arts; fine & decorative arts
104
616 - Diseases
102
620 - Engineering & allied operations
100
600 - Technology
97
380 - Commerce, communications & transportation
96
500 - Natural sciences & mathematics
94
302 - Social interaction
75
000 - Computer science, information & general works
72
630 - Agriculture & related technologies
69
327 - International relations
65
580 - Plants (Botany)
57
650 - Management & auxiliary services
55
140 - Specific philosophical schools
53
303 - Social processes
52
621 - Applied physics
51
158 - Applied psychology
50
910 - Geography & travel
47
364 - Criminology
46
371 - Schools & their activities; special education
46
332 - Financial economics
45
336 - Public finance
45
745 - Decorative arts
45
003 - Systems
41
613 - Personal health & safety
40
378 - Higher education
38
418 - Standard usage & applied linguistics
38
040 - [Unassigned]
37
576 - Genetics & evolution
37
571 - Physiology & related subjects
36
more ...