Classification
140 - Specific philosophical schools
363 - Other social problems & services
380 - Commerce, communications & transportation
610 - Medicine & health
700 - The arts; fine & decorative arts
21
333 - Economics of land & energy
17
000 - Computer science, information & general works
16
330 - Economics
14
580 - Plants (Botany)
12
620 - Engineering & allied operations
11
576 - Genetics & evolution
10
600 - Technology
10
551 - Geology, hydrology & meteorology
9
370 - Education
7
900 - History & geography
7
300 - Social sciences
6
340 - Law
6
304 - Factors affecting social behavior
5
540 - Chemistry & allied sciences
5
720 - Architecture
5
800 - Literature & rhetoric
5
320 - Political science
4
414 - Phonology & phonetics
4
581 - Specific topics in natural history
4
612 - Human physiology
4
630 - Agriculture & related technologies
4
658 - General management
4
400 - Language
3
500 - Natural sciences & mathematics
3
170 - Ethics
2
100 - Philosophy & psychology
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
410 - Linguistics
1
550 - Earth sciences
1
657 - Accounting
1