Classification
300 - Social sciences
330 - Economics
340 - Law
320 - Political science
396
900 - History & geography
101
576 - Genetics & evolution
62
630 - Agriculture & related technologies
60
301 - Sociology & anthropology
15
700 - The arts; fine & decorative arts
14
140 - Specific philosophical schools
12
333 - Economics of land & energy
12
370 - Education
12
380 - Commerce, communications & transportation
12
170 - Ethics
10
100 - Philosophy & psychology
9
600 - Technology
8
363 - Other social problems & services
7
610 - Medicine & health
7
000 - Computer science, information & general works
6
200 - Religion
6
304 - Factors affecting social behavior
6
400 - Language
5
620 - Engineering & allied operations
5
361 - Social problems & social welfare in general
4
658 - General management
4
364 - Criminology
2
410 - Linguistics
2
551 - Geology, hydrology & meteorology
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
337 - International economics
1
360 - Social problems & services; associations
1
398 - Folklore
1
500 - Natural sciences & mathematics
1
581 - Specific topics in natural history
1
650 - Management & auxiliary services
1
720 - Architecture
1
770 - Photography, photographs & computer art
1
780 - Music
1
791 - Public performances
1
800 - Literature & rhetoric
1