Classification
370 - Education
100 - Philosophy & psychology
66
300 - Social sciences
55
700 - The arts; fine & decorative arts
50
900 - History & geography
42
320 - Political science
40
610 - Medicine & health
37
333 - Economics of land & energy
27
400 - Language
24
600 - Technology
24
140 - Specific philosophical schools
20
340 - Law
19
330 - Economics
18
380 - Commerce, communications & transportation
16
304 - Factors affecting social behavior
15
301 - Sociology & anthropology
14
363 - Other social problems & services
12
800 - Literature & rhetoric
11
200 - Religion
9
000 - Computer science, information & general works
8
170 - Ethics
8
410 - Linguistics
8
620 - Engineering & allied operations
7
780 - Music
6
361 - Social problems & social welfare in general
5
500 - Natural sciences & mathematics
5
551 - Geology, hydrology & meteorology
5
120 - Epistemology, causation & humankind
4
581 - Specific topics in natural history
4
297 - Islam, Babism & Bahai Faith
3
720 - Architecture
3
530 - Physics
2
657 - Accounting
2
770 - Photography, photographs & computer art
2
160 - Logic
1
360 - Social problems & services; associations
1
364 - Criminology
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
612 - Human physiology
1
630 - Agriculture & related technologies
1
658 - General management
1