Classification
520 - Astronomy & allied sciences
500 - Natural sciences & mathematics
468
530 - Physics
25
700 - The arts; fine & decorative arts
25
900 - History & geography
22
333 - Economics of land & energy
17
000 - Computer science, information & general works
15
320 - Political science
11
330 - Economics
10
300 - Social sciences
9
600 - Technology
9
100 - Philosophy & psychology
8
610 - Medicine & health
8
576 - Genetics & evolution
7
363 - Other social problems & services
6
200 - Religion
5
540 - Chemistry & allied sciences
5
370 - Education
4
620 - Engineering & allied operations
4
720 - Architecture
4
800 - Literature & rhetoric
4
140 - Specific philosophical schools
3
580 - Plants (Botany)
3
581 - Specific topics in natural history
3
120 - Epistemology, causation & humankind
2
170 - Ethics
2
301 - Sociology & anthropology
2
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
2
630 - Agriculture & related technologies
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
400 - Language
1
410 - Linguistics
1
510 - Mathematics
1
658 - General management
1