Classification
100 - Philosophy & psychology
320 - Political science
330 - Economics
156
300 - Social sciences
127
900 - History & geography
120
170 - Ethics
101
200 - Religion
85
340 - Law
69
700 - The arts; fine & decorative arts
65
140 - Specific philosophical schools
62
370 - Education
45
333 - Economics of land & energy
39
000 - Computer science, information & general works
38
301 - Sociology & anthropology
38
363 - Other social problems & services
36
600 - Technology
34
610 - Medicine & health
26
800 - Literature & rhetoric
25
380 - Commerce, communications & transportation
23
400 - Language
23
120 - Epistemology, causation & humankind
18
620 - Engineering & allied operations
18
297 - Islam, Babism & Bahai Faith
15
304 - Factors affecting social behavior
14
410 - Linguistics
14
530 - Physics
13
576 - Genetics & evolution
13
581 - Specific topics in natural history
13
630 - Agriculture & related technologies
11
780 - Music
10
361 - Social problems & social welfare in general
9
551 - Geology, hydrology & meteorology
9
350 - Public administration & military science
5
500 - Natural sciences & mathematics
5
720 - Architecture
5
770 - Photography, photographs & computer art
4
658 - General management
3
296 - Judaism
2
360 - Social problems & services; associations
2
364 - Criminology
2
520 - Astronomy & allied sciences
2
920 - Biography, genealogy & insignia
2
550 - Earth sciences
1
580 - Plants (Botany)
1
657 - Accounting
1