Classification
140 - Specific philosophical schools
330 - Economics
380 - Commerce, communications & transportation
610 - Medicine & health
700 - The arts; fine & decorative arts
17
000 - Computer science, information & general works
15
363 - Other social problems & services
14
333 - Economics of land & energy
12
600 - Technology
12
370 - Education
6
620 - Engineering & allied operations
6
900 - History & geography
6
551 - Geology, hydrology & meteorology
5
580 - Plants (Botany)
4
658 - General management
4
800 - Literature & rhetoric
4
304 - Factors affecting social behavior
3
340 - Law
3
400 - Language
3
630 - Agriculture & related technologies
3
720 - Architecture
3
200 - Religion
2
320 - Political science
2
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
301 - Sociology & anthropology
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
657 - Accounting
1