Classification
576 - Genetics & evolution
330 - Economics
517
320 - Political science
466
900 - History & geography
460
300 - Social sciences
448
340 - Law
69
333 - Economics of land & energy
39
000 - Computer science, information & general works
36
600 - Technology
35
700 - The arts; fine & decorative arts
32
363 - Other social problems & services
27
380 - Commerce, communications & transportation
20
620 - Engineering & allied operations
17
140 - Specific philosophical schools
13
100 - Philosophy & psychology
10
500 - Natural sciences & mathematics
10
610 - Medicine & health
9
658 - General management
9
551 - Geology, hydrology & meteorology
8
720 - Architecture
8
370 - Education
7
540 - Chemistry & allied sciences
6
580 - Plants (Botany)
6
581 - Specific topics in natural history
6
800 - Literature & rhetoric
6
630 - Agriculture & related technologies
5
301 - Sociology & anthropology
4
304 - Factors affecting social behavior
4
400 - Language
4
530 - Physics
4
200 - Religion
2
350 - Public administration & military science
2
410 - Linguistics
2
414 - Phonology & phonetics
2
657 - Accounting
2
160 - Logic
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
343 - Military, tax, trade & industrial law
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
615 - Pharmacology & therapeutics
1
780 - Music
1
791 - Public performances
1
943 - Central Europe; Germany
1