Classification
380 - Commerce, communications & transportation
300 - Social sciences
67
600 - Technology
33
900 - History & geography
30
000 - Computer science, information & general works
29
700 - The arts; fine & decorative arts
29
320 - Political science
28
330 - Economics
23
140 - Specific philosophical schools
18
363 - Other social problems & services
18
620 - Engineering & allied operations
16
370 - Education
15
340 - Law
14
301 - Sociology & anthropology
12
333 - Economics of land & energy
12
400 - Language
10
610 - Medicine & health
10
100 - Philosophy & psychology
8
720 - Architecture
8
410 - Linguistics
7
500 - Natural sciences & mathematics
7
630 - Agriculture & related technologies
7
576 - Genetics & evolution
6
200 - Religion
5
800 - Literature & rhetoric
5
581 - Specific topics in natural history
4
780 - Music
4
170 - Ethics
3
658 - General management
3
361 - Social problems & social welfare in general
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
364 - Criminology
1
530 - Physics
1
540 - Chemistry & allied sciences
1
650 - Management & auxiliary services
1
657 - Accounting
1
791 - Public performances
1