Classification
320 - Political science
700 - The arts; fine & decorative arts
900 - History & geography
600 - Technology
24
363 - Other social problems & services
22
300 - Social sciences
21
330 - Economics
20
000 - Computer science, information & general works
18
620 - Engineering & allied operations
18
100 - Philosophy & psychology
16
140 - Specific philosophical schools
16
340 - Law
14
333 - Economics of land & energy
13
380 - Commerce, communications & transportation
13
720 - Architecture
12
370 - Education
11
400 - Language
11
200 - Religion
9
301 - Sociology & anthropology
9
630 - Agriculture & related technologies
7
170 - Ethics
5
576 - Genetics & evolution
5
610 - Medicine & health
5
770 - Photography, photographs & computer art
5
780 - Music
5
800 - Literature & rhetoric
5
304 - Factors affecting social behavior
4
410 - Linguistics
4
581 - Specific topics in natural history
4
500 - Natural sciences & mathematics
3
658 - General management
3
297 - Islam, Babism & Bahai Faith
2
361 - Social problems & social welfare in general
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
120 - Epistemology, causation & humankind
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
580 - Plants (Botany)
1