Classification
320 - Political science
340 - Law
330 - Economics
4,804
300 - Social sciences
338
900 - History & geography
297
700 - The arts; fine & decorative arts
158
630 - Agriculture & related technologies
101
100 - Philosophy & psychology
70
140 - Specific philosophical schools
67
333 - Economics of land & energy
53
200 - Religion
49
363 - Other social problems & services
42
170 - Ethics
39
370 - Education
34
600 - Technology
30
000 - Computer science, information & general works
29
380 - Commerce, communications & transportation
27
610 - Medicine & health
24
301 - Sociology & anthropology
19
304 - Factors affecting social behavior
17
551 - Geology, hydrology & meteorology
16
576 - Genetics & evolution
16
800 - Literature & rhetoric
16
620 - Engineering & allied operations
14
361 - Social problems & social welfare in general
12
581 - Specific topics in natural history
11
400 - Language
10
720 - Architecture
8
297 - Islam, Babism & Bahai Faith
7
350 - Public administration & military science
7
364 - Criminology
7
658 - General management
7
410 - Linguistics
6
500 - Natural sciences & mathematics
6
120 - Epistemology, causation & humankind
5
580 - Plants (Botany)
5
360 - Social problems & services; associations
4
338 - Production
3
780 - Music
3
791 - Public performances
3
296 - Judaism
2
398 - Folklore
2
530 - Physics
2
657 - Accounting
2
770 - Photography, photographs & computer art
2
160 - Logic
1
337 - International economics
1
347 - Civil procedure & courts
1
414 - Phonology & phonetics
1
940 - History of Europe
1