Classification
370 - Education
300 - Social sciences
73
900 - History & geography
68
100 - Philosophy & psychology
65
700 - The arts; fine & decorative arts
45
320 - Political science
41
333 - Economics of land & energy
41
600 - Technology
37
400 - Language
33
330 - Economics
23
380 - Commerce, communications & transportation
22
200 - Religion
18
304 - Factors affecting social behavior
17
410 - Linguistics
17
610 - Medicine & health
17
140 - Specific philosophical schools
16
340 - Law
15
500 - Natural sciences & mathematics
13
800 - Literature & rhetoric
11
000 - Computer science, information & general works
10
363 - Other social problems & services
10
301 - Sociology & anthropology
8
297 - Islam, Babism & Bahai Faith
7
170 - Ethics
6
414 - Phonology & phonetics
5
576 - Genetics & evolution
5
780 - Music
5
361 - Social problems & social welfare in general
4
120 - Epistemology, causation & humankind
3
530 - Physics
3
551 - Geology, hydrology & meteorology
3
350 - Public administration & military science
2
581 - Specific topics in natural history
2
720 - Architecture
2
770 - Photography, photographs & computer art
2
360 - Social problems & services; associations
1
620 - Engineering & allied operations
1
658 - General management
1
920 - Biography, genealogy & insignia
1