Classification
140 - Specific philosophical schools
370 - Education
900 - History & geography
600 - Technology
15
333 - Economics of land & energy
14
100 - Philosophy & psychology
13
700 - The arts; fine & decorative arts
13
363 - Other social problems & services
12
320 - Political science
11
330 - Economics
11
620 - Engineering & allied operations
11
300 - Social sciences
10
400 - Language
9
000 - Computer science, information & general works
8
380 - Commerce, communications & transportation
8
610 - Medicine & health
7
170 - Ethics
6
200 - Religion
6
301 - Sociology & anthropology
6
576 - Genetics & evolution
5
800 - Literature & rhetoric
5
410 - Linguistics
4
340 - Law
3
551 - Geology, hydrology & meteorology
3
720 - Architecture
3
414 - Phonology & phonetics
2
630 - Agriculture & related technologies
2
658 - General management
2
780 - Music
2
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
500 - Natural sciences & mathematics
1
581 - Specific topics in natural history
1
770 - Photography, photographs & computer art
1