Classification
720 - Architecture
700 - The arts; fine & decorative arts
19
600 - Technology
18
333 - Economics of land & energy
15
900 - History & geography
14
000 - Computer science, information & general works
12
380 - Commerce, communications & transportation
11
620 - Engineering & allied operations
10
330 - Economics
9
363 - Other social problems & services
8
320 - Political science
7
576 - Genetics & evolution
7
610 - Medicine & health
7
340 - Law
5
140 - Specific philosophical schools
4
370 - Education
4
551 - Geology, hydrology & meteorology
4
630 - Agriculture & related technologies
4
800 - Literature & rhetoric
4
400 - Language
3
170 - Ethics
2
300 - Social sciences
2
580 - Plants (Botany)
2
200 - Religion
1