Classification
300 - Social sciences
576 - Genetics & evolution
900 - History & geography
458
320 - Political science
450
330 - Economics
449
340 - Law
64
100 - Philosophy & psychology
19
301 - Sociology & anthropology
17
700 - The arts; fine & decorative arts
16
140 - Specific philosophical schools
14
333 - Economics of land & energy
13
600 - Technology
11
581 - Specific topics in natural history
10
363 - Other social problems & services
9
380 - Commerce, communications & transportation
9
620 - Engineering & allied operations
9
000 - Computer science, information & general works
8
200 - Religion
8
610 - Medicine & health
8
370 - Education
7
500 - Natural sciences & mathematics
6
170 - Ethics
5
580 - Plants (Botany)
5
400 - Language
4
540 - Chemistry & allied sciences
4
551 - Geology, hydrology & meteorology
4
630 - Agriculture & related technologies
4
410 - Linguistics
3
414 - Phonology & phonetics
3
612 - Human physiology
3
720 - Architecture
3
364 - Criminology
2
658 - General management
2
780 - Music
2
800 - Literature & rhetoric
2
296 - Judaism
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
343 - Military, tax, trade & industrial law
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
530 - Physics
1
920 - Biography, genealogy & insignia
1
943 - Central Europe; Germany
1