Classification
320 - Political science
700 - The arts; fine & decorative arts
900 - History & geography
300 - Social sciences
30
600 - Technology
26
330 - Economics
25
363 - Other social problems & services
23
140 - Specific philosophical schools
20
000 - Computer science, information & general works
19
100 - Philosophy & psychology
18
340 - Law
18
620 - Engineering & allied operations
18
333 - Economics of land & energy
14
380 - Commerce, communications & transportation
14
370 - Education
13
400 - Language
13
720 - Architecture
13
200 - Religion
10
301 - Sociology & anthropology
10
630 - Agriculture & related technologies
8
576 - Genetics & evolution
7
170 - Ethics
6
581 - Specific topics in natural history
6
770 - Photography, photographs & computer art
6
304 - Factors affecting social behavior
5
610 - Medicine & health
5
780 - Music
5
800 - Literature & rhetoric
5
410 - Linguistics
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
160 - Logic
1
193 - Philosophy of Germany & Austria
1
338 - Production
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
580 - Plants (Botany)
1