Classification
140 - Specific philosophical schools
320 - Political science
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
22
363 - Other social problems & services
18
330 - Economics
17
000 - Computer science, information & general works
16
600 - Technology
16
333 - Economics of land & energy
15
900 - History & geography
10
581 - Specific topics in natural history
9
610 - Medicine & health
9
304 - Factors affecting social behavior
8
551 - Geology, hydrology & meteorology
8
576 - Genetics & evolution
8
620 - Engineering & allied operations
7
340 - Law
6
370 - Education
6
720 - Architecture
5
100 - Philosophy & psychology
4
200 - Religion
4
300 - Social sciences
4
361 - Social problems & social welfare in general
4
500 - Natural sciences & mathematics
4
297 - Islam, Babism & Bahai Faith
3
301 - Sociology & anthropology
3
400 - Language
3
414 - Phonology & phonetics
3
658 - General management
3
800 - Literature & rhetoric
3
540 - Chemistry & allied sciences
2
630 - Agriculture & related technologies
2
170 - Ethics
1
336 - Public finance
1
360 - Social problems & services; associations
1
410 - Linguistics
1
550 - Earth sciences
1
580 - Plants (Botany)
1
657 - Accounting
1