Classification
330 - Economics
407
301 - Sociology & anthropology
250
900 - History & geography
226
320 - Political science
185
333 - Economics of land & energy
149
700 - The arts; fine & decorative arts
103
610 - Medicine & health
87
370 - Education
82
300 - Social sciences
80
363 - Other social problems & services
71
140 - Specific philosophical schools
69
820 - English & Old English literatures
65
600 - Technology
57
305 - Social groups
56
000 - Computer science, information & general works
53
380 - Commerce, communications & transportation
52
331 - Labor economics
49
004 - Data processing & computer science
48
658 - General management
43
200 - Religion
38
340 - Law
37
304 - Factors affecting social behavior
33
362 - Social welfare problems & services
32
400 - Language
32
005 - Computer programming, programs & data
26
630 - Agriculture & related technologies
24
158 - Applied psychology
23
500 - Natural sciences & mathematics
23
780 - Music
23
800 - Literature & rhetoric
23
100 - Philosophy & psychology
22
930 - History of ancient world to ca. 499
22
650 - Management & auxiliary services
21
170 - Ethics
20
302 - Social interaction
20
940 - History of Europe
19
338 - Production
18
570 - Life sciences; biology
18
371 - Schools & their activities; special education
17
551 - Geology, hydrology & meteorology
17
576 - Genetics & evolution
16
336 - Public finance
15
620 - Engineering & allied operations
15
306 - Culture & institutions
14
332 - Financial economics
14
361 - Social problems & social welfare in general
14
581 - Specific topics in natural history
14
006 - Special computer methods
13
297 - Islam, Babism & Bahai Faith
12
346 - Private law
12
more ...