Classification
320 - Political science
330 - Economics
180
333 - Economics of land & energy
136
700 - The arts; fine & decorative arts
115
363 - Other social problems & services
108
900 - History & geography
64
000 - Computer science, information & general works
57
600 - Technology
56
380 - Commerce, communications & transportation
49
140 - Specific philosophical schools
46
720 - Architecture
43
551 - Geology, hydrology & meteorology
40
610 - Medicine & health
39
300 - Social sciences
36
370 - Education
30
340 - Law
28
620 - Engineering & allied operations
28
630 - Agriculture & related technologies
23
576 - Genetics & evolution
15
581 - Specific topics in natural history
15
100 - Philosophy & psychology
12
301 - Sociology & anthropology
11
304 - Factors affecting social behavior
11
800 - Literature & rhetoric
11
658 - General management
10
580 - Plants (Botany)
9
500 - Natural sciences & mathematics
7
361 - Social problems & social welfare in general
6
400 - Language
5
410 - Linguistics
5
170 - Ethics
4
200 - Religion
4
350 - Public administration & military science
4
414 - Phonology & phonetics
3
540 - Chemistry & allied sciences
3
657 - Accounting
3
323 - Civil & political rights
2
360 - Social problems & services; associations
2
550 - Earth sciences
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
302 - Social interaction
1
339 - Macroeconomics & related topics
1
530 - Physics
1
615 - Pharmacology & therapeutics
1
650 - Management & auxiliary services
1
770 - Photography, photographs & computer art
1
780 - Music
1
791 - Public performances
1
943 - Central Europe; Germany
1