Classification
140 - Specific philosophical schools
380 - Commerce, communications & transportation
610 - Medicine & health
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
13
363 - Other social problems & services
11
600 - Technology
11
333 - Economics of land & energy
10
900 - History & geography
9
000 - Computer science, information & general works
8
576 - Genetics & evolution
7
580 - Plants (Botany)
7
300 - Social sciences
6
330 - Economics
6
500 - Natural sciences & mathematics
5
551 - Geology, hydrology & meteorology
5
340 - Law
4
540 - Chemistry & allied sciences
4
720 - Architecture
4
800 - Literature & rhetoric
4
414 - Phonology & phonetics
3
581 - Specific topics in natural history
3
612 - Human physiology
3
630 - Agriculture & related technologies
3
170 - Ethics
2
370 - Education
2
658 - General management
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
400 - Language
1