Classification
300 - Social sciences
700 - The arts; fine & decorative arts
900 - History & geography
150
320 - Political science
51
330 - Economics
35
100 - Philosophy & psychology
29
301 - Sociology & anthropology
29
800 - Literature & rhetoric
24
140 - Specific philosophical schools
21
600 - Technology
21
720 - Architecture
17
200 - Religion
15
780 - Music
14
363 - Other social problems & services
13
380 - Commerce, communications & transportation
12
620 - Engineering & allied operations
12
000 - Computer science, information & general works
11
340 - Law
11
610 - Medicine & health
10
630 - Agriculture & related technologies
9
333 - Economics of land & energy
8
370 - Education
8
400 - Language
8
304 - Factors affecting social behavior
6
410 - Linguistics
6
576 - Genetics & evolution
6
770 - Photography, photographs & computer art
6
791 - Public performances
5
170 - Ethics
4
500 - Natural sciences & mathematics
4
530 - Physics
4
120 - Epistemology, causation & humankind
3
658 - General management
3
160 - Logic
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
241 - Christian ethics
1
297 - Islam, Babism & Bahai Faith
1
338 - Production
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
943 - Central Europe; Germany
1