Classification
300 - Social sciences
700 - The arts; fine & decorative arts
900 - History & geography
320 - Political science
39
330 - Economics
24
301 - Sociology & anthropology
22
100 - Philosophy & psychology
21
140 - Specific philosophical schools
17
720 - Architecture
15
600 - Technology
13
800 - Literature & rhetoric
12
340 - Law
10
380 - Commerce, communications & transportation
9
780 - Music
9
400 - Language
8
620 - Engineering & allied operations
8
791 - Public performances
7
333 - Economics of land & energy
6
370 - Education
6
410 - Linguistics
6
770 - Photography, photographs & computer art
6
200 - Religion
5
576 - Genetics & evolution
5
610 - Medicine & health
5
630 - Agriculture & related technologies
5
363 - Other social problems & services
4
530 - Physics
4
170 - Ethics
3
304 - Factors affecting social behavior
3
658 - General management
3
000 - Computer science, information & general works
2
120 - Epistemology, causation & humankind
2
580 - Plants (Botany)
2
160 - Logic
1
241 - Christian ethics
1
338 - Production
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
943 - Central Europe; Germany
1