Classification
100 - Philosophy & psychology
320 - Political science
370 - Education
300 - Social sciences
19
900 - History & geography
16
330 - Economics
12
700 - The arts; fine & decorative arts
11
333 - Economics of land & energy
10
140 - Specific philosophical schools
9
600 - Technology
8
301 - Sociology & anthropology
7
380 - Commerce, communications & transportation
7
400 - Language
7
410 - Linguistics
6
610 - Medicine & health
6
000 - Computer science, information & general works
5
170 - Ethics
5
340 - Law
5
620 - Engineering & allied operations
4
304 - Factors affecting social behavior
3
363 - Other social problems & services
3
780 - Music
3
200 - Religion
2
658 - General management
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
500 - Natural sciences & mathematics
1
530 - Physics
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1
770 - Photography, photographs & computer art
1